You can't compare a car to script writing. You at least have some idea of how a car works and can figure out where the problem lies.
I believe I can. The question is not where the problem lies, although that's not too difficult to work out, it's that there is a problem.
Screenplays are different. It's an art form, its a form of expression, it's writing.
I am aware of the differences but if a car and a screenplay both have problems, I don’t see that it is necessary to understand how either is constructed in order to say so.
People who want to be critical of a screen play and say that the person who wrote the script can't do their job and are piss poor at it then obviously knows how a screen play should be written and knows how to develop a story.
I think that’s an invalid conclusion. All they need are the results. It is possible to say whether a politician is effective or not, without having any idea how to be one, just by looking at what they achieve. In my view, in terms of STXI, the results were emotionally satisfying for most people (not myself overall) but clearly lacking in other areas.
If you're going to bash the story, how would you make it better. Don't just bash the script and the writer without stating how you would approach the story and make it better. And no, Kirk having blue eyes isn't an element to make the script better.
That may be how you would prefer people to make their complaints and I would agree with you, but that is a different argument to "requiring" someone be able to write a better screenplay before that have a right to express an opinion on someone else efforts. Ironically though, Saquist did seem to state what he thought was wrong with it in the general terms you might when complaining about a car breaking down (I am not saying I agree with him in that area specifically however).