Yes, language evolves, but there will always have been people who didn't care for the changes while they were taking place.
A lot of languages manage quite well without the genitive apostrophe and English seems to be moving in that direction, but why anyone would think an apostrophe was necessary in a plural beats me!
Alexa, I feel certain that those who use apostrophes wrongly, don't know the rules and therefore cannot check them.
I have taught English as a foreign language for years, and all my pupils have been taught the rules and didn't find them difficult, which rather points to the fact that you need to have been taught them.