@Reasonable
You simply seem too rigid on what is an "adventure" game.
I played great adventure games that mixed the "pure" textual adventure with RPG elements such as combat, stat-augmenting items etc. The Hobbit was such a game, the outcome of the fights was semi-random like in an RPG.
In Myst, that you named, the exploration is interspersed with small logical puzzles that are more like self-contained flash mini-games, and are more extraneous to the plot than the action scenes were in Fahrenheit.
All of these are ok, but using QTE based action scenes is "weak"? I think they're simply a different tool, with which they can deliver good or bad content and narration. After all, if in an adventure you're lending your intelligence to the character, as in you're solving predetermined situations with your inventive, I don't see anything wrong with you also having to lend your reflexes or endurance when the character is tested for them, again in predetermined situations.
I loved most of Fahrenheit, and what I loathed of it has to do with the way its plot falls apart by the end, not the way its mechanic worked.
Some of what they delivered with those QTEs was great and if the dream of the giant fleas in the office space was a cut-scene instead it would not have worked the same for me.
