Note, we like other apes evolved to climb trees not rock walls.

I will note also that compared to climbing rocks, climbing trees with slightly sweaty hands is MUCH easier than with dry or chalked hands. I think its due to bark being the grip target versus rocks.

Nothing more than my experience but sending a cliff is nothing like climbing trees.

Eh, if you can wrap your fingers around something like a branch, then it probably doesn't matter. I find that for that first ten feet of bare trunk, however, dry hands are better.

Just noting climbing a tree is infinitely different than sending a 5.10b route.

The strategy involved in the two is night and day. One focuses on fingertips not slipping and the other involves not losing grip.

Actually there's a moisture level that is ideal for climbing on rock. Chalk just helps climbers stay near that ideal level.

In fact there's a high level climber who's sweat glands do not work and to compensate he has to bring a water mister around with him so that he can climb.