I occasionally read his (and other critics) reviews to see what they say they taste in wines. Having worked in the biz, you do get a huge amount of people who want high scores, the "scorewhores" basically. Same type of people chase labels too, they want Rombauer Chard and Silver Oak Cab. They need to be told what to consume and they want the bragging rights to show off to their friends.
As far as winemakers Parkerizing wines, it could be that they want validation, their bosses pressure them for those scores, or they simply like hugely extracted wines..Obviously his style is popular, or we've been collectively led to believe it's popular. Sometimes I genuinely agree with him, other times I scratch my head and just figure I'm not as educated as he in terms of finding the elements he's writing about.
I always figured we should drink what we like and keep an open mind. I have no trouble admitting I like a wine from a winery that makes 500,000 cases as much as I might like a wine from a tiny little 2500 case lot.