It's not just about that limit though and it's not even a complaint to be clear. If eth pays me 5-10% per year for a simple cryptographic signature, great, not gonna say no.
But it inherently makes the system unfair, I have 0 pressure to sell that eth since it didn't really take me any effort to make it and I don't need it to cover life expenses, whereas for someone who has much less money, well that return on their eth (say from pools), they'll probably need to sell it to cover some other costs (rents for example). So for the wealthy, their shares grows while everyone has pressure to sell. There's also a cycle where if you're a staker and few other people sell, price will skyrocket, make it even more unaccessible.
I really hope that we avoid these scenarios in real world, but I'm a bit skeptical.