It would take a minimum of effort for a good writer to tell a story within established continuity.
Anything else is laziness. Period.
Wrong.
How many successful screenplays have you written using established characters in a fixed continuity?
Considering Trek's continuity to be not worth adhering to has nothing to do with laziness but possibly a good deal to do with not being overly impressed by the
content of that continuity. I'll certainly be glad to see a great many things changed or abandoned - the movie would be better for that, for much of the continuity is not worth preserving.
A lot of fans like to assert that ignoring continuity is "lazy," but they never support that in any way - it's treated as a self-evident assertion, because all it actually represents is the sentiment "I like the continuity and don't want to see it ignored."
Then there's the ever-popular "then do something else just don't call it 'Star Trek'" which insinuates that the continuity is the most or one of the most important things that makes Trek unique and worthwhile. Since that's not so, this assertion is another non-starter.