I believe this is an over-simplification. Pressler is responsible for opening DCA, which was notorious for having TOO MANY table-service restaurants. If his M.O. was pure the mallification of the DLR, this would not have happened.
Pressler was a profit chaser to a fault, but he would have gladly chased profits towards table service restaurants if the DLR crowd would support it. Hard to support a park full of lavish table service restaurants when your primary demographic would rather walk across the street and eat at a McDonald's to save a few bucks on those non blackout days that they do visit. When your competition is IHOP and McDonald's, you can't compete with $20 plates.
Pressler may be responsible for many mistakes, but he was just as much a reflection of the passholder clientele that Disney cultivated.
Yes, there's less unique "quickie" merch in each of the lands, but the selection at the Disney Gallery Store, Crystal Arts, Cristal d'Orleans, etc. is far from generic. Disney realized the typical tourists don't care and the Disney collector die-hards care deeply, so you got more generic in the standard shops and arguably more unique/lavish selections in the specialty shops like Disney Gallery. This seems to be more a reflection of Disneyland's demographic than some convoluted, Pressler plot.
Disney used to have one demographic (a "general" tourist). Now there are three:
a) general tourist/family
c) Disney fan/collector
Disney started targeting these demographics more specifically as of late rather than trying (and failing) to appeal to everybody all at once. The largest recent example of this is the existence of D23: a targeted product/brand/approach focused solely at the types who would be on these forums. The "one demographic" mentality would never do something like that.