Why can’t Lightning Network Nodes reveal channel balance to improve routing efficiency?

I know that I can announce a channel between the two peers or do it without notice. However, even if the channel is public, the channel balance has not been revealed. As far as I know, this is a concern about the efficiency of routing in Lightning networks.

Why can’t peers opt out of this privacy constraint (along with other peers’ agreements) and reveal the balance between improving routing and network efficiency? Clearing channel balance reduces privacy, but connected peers can benefit financially from doing so.

For example, large LN nodes belonging to the exchange are very likely to agree to this. They are already well known, so they earn more economic benefits and have little privacy concerns. If they don’t care about privacy, this is a win-win situation.

Basically, we sell your information to make more money.