That's not true at all! Photoshop's UI is awful — their strategy is essentially "space shuttle cockpit." A bunch of mono-colored tools with anachronistic icons (ask anyone under 20 what the burn tool icon means — or even what burning is as a photography concept), tools under other tools, options hidden in drawers, incredibly tiny mouse targets. I'd wager that 90% of daily users touch about 40% of the interface they show by default.

You've just been flying for so long that you can't imagine it being any other way (and you say so yourself).