I agree. Unfortunately the complaint is mostly about hating a market dominated by people who increasingly won't pay anything for goods that aren't actually welded in place but will grudgingly fork over money in the form of eyeballs (i.e. ads) and "tricks" (in-app purchases, hidden fees, etc.). Personally, I'd mostly prefer honest up-front pricing (though subscriptions make sense for some things) but the market mostly doesn't want that.
Even if it is an increase in price (debatable), that doesn't mean that Apple's distribution monopoly is responsible. I expect that prices on Android have done the same thing, and Google doesn't even monopolize the distribution there.
The exact same thing has happened in the AAA games market (see EA, Activision, or Jim Sterling's many videos on the topic) which is provably nothing to do with "Apple's distribution monopoly".