I haven't voted yet coz I clean palms with spurs.
So, what's the alternative? Cherry picker, climbing clamps ($2.5K) rope over and dangle etc.
What about of you had to work on a 250' regnans, first branch 100', most would spur.
Hard for me to answer with a 100% no or yes, circumstances and common sense dictate here, what if spiking never pentrated thick bark through to cambium? Pine trees, gum trees such as ironbark, red gum etc, sorry, I know you want an answer from those options but I see too many differering situations ... of course I'd never spur some thin barked ornamental specimen but what if I was a seed collector or wildlife catcher?