It seems like a no compromises staking pool is possible, why hasn’t it been made?

I would like to run a validator with less than 32 ether. Looks like my best bet would be something like rocketpool, but they and other pools require you to invest in their tokens. I could be wrong and invalidate my entire post, but it seems like a pool could be made without that compromise. If that is true, I wonder why one hasn’t been made yet since it would allow more validators to further secure the network and remove financial barriers from the only way to generate ether.

Is my thinking valid or am I misunderstanding something crucial?