I was buying a tire and wheel combo (mounted and balanced) for a car that has TPMS as a standard feature. The only way I could avoid the TPMS install was to specify that a local installer would be doing that work. In that case, I doubt the tires would have been mounted and balanced for me.
Even if I was able to avoid the TPMS this time around, any visit to a shop would be a headache trying to dodge the fact that they are supposed to be installed. I also have no second vehicle to be carting around car tires and rims.
Personally I'd be fine without the TPMS altogether but having them installed will hopefully avoid a headache in the future.