I have a problem with any Top X Number anything list. They are sort of fun to look at, maybe even question what group(s) contributed to them, but I don’t put any real stock in any of them. That goes for AFI, Ebert, any other critic, or whomever. The Book Of Lists (any of several editions) has many such lists and they all disagree in some ways. That helps me make my point, I think.
I even have trouble making my own “Top x-number” list of anything. Memory prevents my listing all candidates to start with, and changing tastes prevent me from a rigorous ranking of them. There are newer items that rise pretty high and older items that drop off the list.
There’s even an old thread I started that dealt with those Golden Oldies that now seem stupid.
The main bone I have to pick with the IMDB list(s) is that the voting members do seem to be in a much younger age group than my cohort, and I suspect my cohort (geezers) would make radical changes to the IMDB list(s).
That’s why we have salt and pepper.