My understanding is that track riders use 23 or smaller tires at high pressures.
Do they know something we don't know?
They can ride very high pressures because the track surface is so smooth of course
And in those circumstances it makes sense to go for the lightest and most aero set up possible consistent with the rider's handling/grip preferences and the range of wheel width options. So it's not likely they've been on 17mm tyres, but 21mm for example on a narrow-ish rim at 150psi might well be a very fast set up for them in a way it wouldn't be on the road
Seems like a contradiction to me. Either a larger tire has less rolling resistance (and hence faster) or it's not. To say nothing of tire pressure.
Lets split between deforming loss (loss from tire deforming when contact with the road) and suspension loss (loss from tire is too stiff thus when you hit uneven surface, it lift your whole bike up and energy are loss).
Suspension loss are real and more meaningful than most people think, even smooth tarmac still has some texture in it which is like a tiny hill that tires have to cross up and down. For this, lower pressure tire can comply with the surface better. So wider (and lower pressure) is better.
Rolling resistant, however. is harder to define. Some will only count for tire deformation loss (actual force that resist your rolling) that can measure on the roller but some also include suspension loss (energy wasted to lift your bike up also mean you are slower.) but let assume that they are part of the rolling resistant.
Higher pressure tire are stiffer and deform less, so they loss less energy in deforming less. (but more in the suspension loss). Generally suspension loss are greater than tire deform loss in average to bad road thus wider tire and lower psi are faster.
Indoor track are super duper smooth thus we can negate suspension loss. Then any tires with very high psi will have low deformation loss but the narrower one is more aero and weight less.