Who said I denied it? My very first words say that it is not overrated in general. All those albums you named I was around for. The problem is people forget that not everything in the 90s was flawless, there were gimmicks, industry plants, white guys who were going to take over and ruin the genre, negativity, etc, etc, etc.
Certainly if someone wants to look like a very knowledgeable Hip Hop head and not some johnny come lately listener they are going to cite albums from the 90s that are deemed classics. That doesn't mean the albums are not good but to be like 'Nah fukk Drake, let me know when he makes a Illadelph Halflife' it comes off as hipster-esque and a bit of a put on.
Well when people are saying how great the 90's were, that doesn't mean they're denying that any bad music came out during that time period either. That kind of goes without saying. The focus is on the good music that did come out, and that really isn't coming out anymore.