Yea I'm not a huge fan om jump being so str dependant. Not sure how d&d raw describes it, but a jump in the real world is not about absolute strength but more a str to body size relation, so relative str. Otherwise power lifters would have the world record in long jump 😂
It would add way more freedom in the game if it was str or Dex, whichever is higher.
Well. In raw, things like climbing, jumping and swimming are governed by your athletics skill, the only skill governed by strength. Other things governed by strength is carrying capacity, attack and damage when using a melee weapon and other situations that would probably need psychical prowess or brute force, like Shove or breaking through a door etc.
So, even though your idea would technically work since acrobatics, which is governed by dex, could easily be connoted with jumping; removing one of the few things that Strength governs would lessen its value as an ability stat quite significantly. For a finesse weapon wielder that don't care about carrying capacity, the change would turn strength to a complete dump stat. Some players would be fine with that, others not.
Edit: Worth mentioning, this is how it works in raw. I don't know how Larian implemented it in BG3,
