Do you nail plate your holes?
Having spent over 15 years as an electrical contractor and electrician wiring houses, I find it absurd that you would use 1 1/2" in a 2x4 stud anywhere other than directly above the distribution device.
If you drill anything larger than 1" in a 2x4 you must by code nail plate, read 800.6 in the NEC.
I am also surprised a general contractor would not say anything about drilling such large holes when they are not necessary.
Unles you are pulling more than 6 cables through the same hole anything larger than 7/8" is overkill, if you are pulling more cables drill an additional hole.
If you are using composite cable maybe a 1 1/8" hole, but then again, you must nail plate every hole.
I would be willing to bet, I could drill 2 - 7/8" holes with a hole hawg faster than you can drill a 1 1/2" since you have to be much more cautious of centering the hole in the stud when it is that large.
The easiest way to drill a house is to go through with the normal (7/8”) bit first and drill all your horizontal runs and verticals over outlets. Then you change the bit 1 time and drill the large holes over the service or in this case the distribution device. If changing the bits is too difficult for you, perhaps you should consider a new line of work.
Richard S. Anderson, RCDD