Pretty much all that he said could be written as "I dont find graphic adventure games fun", Im a big fan of old graphic adventure games, the fun of it was how the game actually plays in your head rather than on screen. Yes, there are bad examples of puzzles, bad pacing, and times were its plain obvious that the game is "a game" that makes you do X thing to continue, but its a problem of design and not mechanics.
I can say "shooting things is stale and boring", and its just an opinion, like this:
Unlike the adventure game, roleplaying games usually have a fascinating game engine of levels, powers and resources to keep the play brain occupied. While the mid-game of The Walking Dead might involve searching a train carriage for a bottle of whiskey, the mid-game of Diablo is hitting things and using spells. It’s simply more active.
It almost enrages me, grinding is one of the worst stuff I can think in videogames, but hey, everyone has their own tastes.
Most of the people think like this guy, and thats why adventure games are not as appealing as killing 200 guys with a gun or run around doing chores for a little reward in most Wrpgs. One thing is a poorly done puzzle, another thing is saying that killing random stuff is "better" because it has more action. If you dont like turn based combats, you wont like most of the jrpgs.
Look at a game like The Last Express, its great storytelling, replayability, and dynamic enviroment, then look at grim fandango, both great games with a different approach to puzzle solving.
http://grumpygamer.com/2152210Thats a good article about adventure games and their flaws, written by one of the big fathers of the genre.