I haven't been able to find any rules that say you wouldn't, but it feels bad to specialize in things like Cloud Jump and then break your ankles on the landing.
Well, if you jump on to something, you take no damage landing. That is the point.
Being able to jump and land on top of a castle wall is certainly a great skill.
If you jump over something and fall down the same distance on the other side, you take fall damage.
So jumping over that castle wall in one swoop without landing on top of it is going to be painful.
The rules don't explicitely say so because that's just what happens in real life and shouldn't need extra explanation.
You jump on to a stack of boxes to stand on top? Good for you. You jump over a stack of boxes of the same height? You basically fall down the other side. You better put some gymnastics mats on the other side. World class athletes do it, your character faces the same problem. Being able to jump high doesn't mean you have a way to harmlessly glide to the ground on the other side.
You only take fall damage if you're falling
Using something like Cloud Jump to leap 20 feet up wouldn't hurt you, as you would end your High Jump at the top of that leap. After taking that activity however, you would fall as normal taking damage following the rules for fall damage you linked.
As you've said it would be good to jump without breaking your ankles. So you have a few options according to those fall damage rules:
- Fall onto something within 5 feet - Jump onto the building instead of into the open air
- Grab an Edge - Don't fall at all
- Fall into water, snow, or another relatively soft substance - Ignore up to 30 feet of falling distance depending on the depth of the substance
The rules are clear, if you fall more than 5 feet, you take damage, it does not matter how you got that high.
Realistically, if your bones, tendons and muscles are strong enough to propel you to X feet in the air, they are definetely strong enough to absorb the shock of falling from X. I can easily jump from 5 feet, but have no chance of jumping to even 4 feet.
Basically, the rules are wrong in this regard. This is not just PF2, DnD does the same for example.
If I were your GM, I would just house-rule that you cannot hurt yourself with a muscle-powered jump unless your fall is more than you jumped.
The Cat Fall skill feat can help with this:
|Proficiency||Fall reduction (feet)||Deals with|
|Trained||10||Highest jump without feats and equipment|
|Expert||25||Blast Boots (Moderate)|
|Master||50||Blast Boots (Greater), Cloud jump|
|Legendary||any||Blast Boots (Major)|