Are 22mm tires too thin for commuting?
Most of your fears are unfounded or way overblown.


  If I am going fast and I hit a small (less then 3" bump) I might get a pinch flat.


Pinch flats do not occur on tires that are properly inflated.


  I cannot not ride off a curb on to the payment and not wreck my bike.


I do this on both my commuter and my racing bike. Just do it gently and not violently.


  I cannot hop curbs.


I do this at slow speeds with no problem.


  I must check my tires after every ride for glass lodged in them and take it out with tweezers.


Easier is to just not ride through glass. I've never had to pick glass out of my tires after three years of commuting by bike.


  If there is a sizable hole (from glass) in my tire I must use a patch kit to patch it up.


Yeah. But again, you shouldn't be flatting this often. I made it 6,500mi on my last pair of tires.


  I must always ride at 120psi per tire (I weigh ~200lbs).


Ride at whatever the printed range is on the tire itself. Some road tires are fine at 85psi. Usually this involves topping up air once every week (for 120+psi tires) or two to three weeks (for 85psi tires).


  My stopping power compared to the mountain bike is really really bad (especially in the rain).


Your front brake should be more than capable of hurtling you over the handlebars if slammed shut at speed. Braking power will be significantly impacted in the rain, however.


  I must pay extreme attention to the road and go around bumps.


Way overblown. Don't go plowing into 5-inch potholes, sure.

If you're having this many problems, you're probably treating your road bike like a mountain bike (why are you having to hop curbs so often — it's a road bike, not a sidewalk bike) and you probably have worn out and/or bargain bin tires. Get some decent tires with puncture protection and chill out a bit.