I have not read all the posts on this topic. However, I feel that spikes (spurs, gaffs, whatever...) are a tool to be used when the situation calls for it.
I will use a ladder when it makes sense. Pole saw, big-shot, bucket truck, spider lift, cranes, bobcats... Throw a rope over a low crotch in lieu of throw line.... whatever.
I use spikes on every removal. Quite honestly, if spikes were not injurious, I would love to use them while pruning tall ash trees and silver maples. A tool to make climbing life easier.
Most of us climb differently while in spikes vs. without. I like the feel of climbing without spikes... but not during a total dismantle or crane removal.
My two cents, Cheers!