I also think it is funny that other musicians would say disparaging things about bands/groups that they have nothing to do with. I always feel that has more to do with their ego than the other group's capabilities. Under what circumstances does one rock legend disparage another? The Doors were the Doors. Their mark is indelible. Much of their music is fantastic in my opinion. If nothing else Jim was the first to have the nerve to disobey Ed Sullivan. Live and on TV. Mick Jagger did not. ;-)
Again, I'm not a big Aerosmith fan. Saw them in concert in 1990. Great show. But I just don't know what to do about a comment like "Aerosmith is not a good band". They've made tons of music enjoyed by millions of people. They've been around for a long time. They've changed with the times and alternated fairly easily between rock/pop/movie scores etc. They are (or were up until recently) nearly a household name and their songs, dating back to the 70s, are still in constant radio rotation. Still, they don't tick the boxes that make me really like or admire a band but I still wouldn't say that they aren't a "good band". The fact that I don't like them doesn't change what they've accomplished. Likewise with The Who, although I am a marginal Who fan.