The thing is, there just aren't that many times I want a timer for. Nobody's out here with a carefully curated gallery of artisanal durations. It takes me more time and effort to scroll to my 15-minute timer than it would to hit 1-5-enter on a numeric keypad.
Hell, even just a +1,+5,+10,+15 grid that starts immediately or adds to the current timer would cover everything I've ever needed within four taps. But, nope, gotta gallivant through my menagerie of exotic timers to pick out the perfect one. Infuriating.