Then ah, why bother? Why not simply move on and never again watch the parts that bother you?
Perhaps for the same reason you bother tilting at this particular windmill: You wish to do so.
Don't like "Who Watches the Watchers" (I don't) never watch it again—but no matter what you personally do the fact remains that the episode tells us something about the Trekverse and Picard as a character so even if I never watch it again in my life it has informed me a bit about both. That can't be casually wiped away by proclaiming I have my own personal canon or continuity.
Evidently it can be, by some—like it or not, admit it or not.
You seem to be assuming that all who detail a personal continuity are interested in eliminating aspects of the
Trek universe for which they have a simple dislike or distaste, rather than because it damages or disrupts their willing suspension of disbelief. That's not necessarily so (though it would, indeed, be justification enough). There's a great deal of
Voyager I revile, for example—poor characterizations, uninspired occurrences,
etc. ... but it's nevertheless a part of my personal continuity. Elements of "Threshold," however (to use one of the most infamous examples) are so
patently absurd that I cannot bring myself to acknowledge they actually transpired, or even that they
could in an otherwise orderly
Trekverse. Thus, I set them aside.
The implication of having either a personal canon (which is impossible unless you're the creator) ...
So therefore you accept Roddenberry's declaration that aspects of
Star Trek V are non-canonical/apocryphal as ... ahem ... gospel? It's his right, according to your statement above: He is, after all, the creator.
Hoist on your own Picard, it would seem.
...or continuity is you're setting out a timeline and or background for the show which isn't our job as fans.
A fan may do whatever he or she likes as relates to his enjoyment of the product—not as a job, but as a hobby or diversion. Nor does he or she require your permission, approval or even understanding.
And you have never wasted time doing something essentially profitless that you nevertheless enjoyed?
I didn't think so.
...unless you are planning on using this to back up some argument or creative venture since it has no bearing on what's considered official.
That last has never been in dispute.
So, then, someone who's, say, written numerous pieces of fanfic would have, according to you, substantive justification for delineating his or her personal continuity—a variant of the canonical
Trekverse?
Otherwise you're just using fancy expressions like "canon" and "Continuity" to mean - "I ignore all the stuff I personally dislike" and to lend weight to your thoughts regarding those things you hate.
As opposed to using terms like "childish" and "silly" to deride those whose motivations are none of your business and whose stances affect you not in the least, except to trigger your unjustified ire and nastiness?
Pot, kettle ... bang.
And those who make such an effort are not ignoring "all the stuff" they "dislike." They're evaluating it, finding it unacceptable for
whatever reasons are valid to them, and setting them aside.
You don't feel the need to bother. They do. Never the twain shall meet.
There are plenty of things in a number of shows I ignore and move on without needing to construct some personal canon or continuity in order for me to continue to enjoy it.
Note that I have not, at any time, demanded that
you construct a personal continuity for
Trek or any other show, nor have I laughed at or commented on your appalling lack of attention to detail for failing to do so.
See, I assume
you're responsible for your own take on
Trek—an allowance you're unwilling to make in kind, it would seem.
See something I don't like, I groan and move on. Something not fully explained - I speculate come to conclusions but don't assume anything I've concluded is the truth of the matter as terms like "Personal canon" or "Personal Continuity" imply.
We've already settled the matter of "personal canon." Let the dead horse alone; you're getting blood and guts everywhere.
I only assume my personal continuity has significance to me or those to whom I've conveyed it, and who subsequently say, "Yeah, I agree."
Other than that, you're quite right: It don't mean jack ...
... except to me and mine—which makes it enormously important to a select group ... and such is all that matters.