If I'd let that stop me I'd never have gotten anything done at all.
Very early on I realised that if you want to do anything in a house that involves pipes or wires, you either track them round the surface or you dig in, put them where they should be, and face the fact that making good the surface finish is an inevitable and major part of the job.
filler sander and paint to match the old, and if you paper, keep a roll back just in case...
I am delighted to be able to match 20 year old paint perfectly