Certainly, people aren't going to erase their memories. At the same time they erased the inconsistencies easily enough. When the Enterprise encountered a planet in the wrong quadrant or home world of a different species. I'm saying that there were so many issues that canon for one group was not so much for another. Had things been consistent and more depth provided fine. As of now, Star Trek is a new world and if something isn't the same as it was in the 1970s so be it. Never is a long time, I stand by my comment.You can't ditch people's memories or attachment to something, or desire to see what happens next instead of what could've happened instead.
OH.. One more 4. Human colonization is the equivalent of a military invasion. It was their migration that caused a lot of the problems.