Rather than bipedalism...

The big difference is humans have a Broca's region on the left side of our brain, which controls the right side of the body...

Other primates have pretty much identical hemispheres:

https://pmc.ncbi.nlm.nih.gov/articles/PMC9472819/

For them, it doesn't matter which side is the driver's seat.

For humans, the side of your brain "driving the bus" not having a language center is a disadvantage. Because what they're saying/hearing is being filtered thru the other hemisphere, which is likely why left handed people are deemed "creative" but almost always in areas not related to straight language. Even songwriters involves much more than word choice.

It's not that they're "better" it's just for most people the half of our brain good at that stuff isn't driving the bus. But it's not that it's a strictly innate thing either, anyone can practice using their hand.

For really crazy stuff about this, look into how we used to separate hemispheres as a seizure treatment.

https://academic.oup.com/brain/article/140/5/1231/2951052?login=false

Quick edit:

Speaking of musicians tho, I'd be interested in an anthro study about the historical trend of musical instruments using the left hand as the "skill hand". Even for right handed people, musicians tend to have better usage of their left hand thru practice of their instrument. And drummers who keep the beat first need to keep both of their own hemispheres in sync.