I do agree, they do think of the VP for various reasons. (buying validator votes, chain halts, and stuff)
Yes in an ideal scenario, it is 1:1 but the hub has no min commission so there is little difference due to that. But I get your point.
There was this debate to change all this in a discussion group “decentralization and governance” one of the participants had this great idea. Summary;
VP should only be used for voting, not for staking reward and commission. (in that example, suppose 2 equally good validators with the same reputation Va has 1% commission and Vb has 2% commission people tend to delegate to lower commission now they have more VP but might not earn as the Vb, because they need 2X more VP to equalize.
Most of the delegators don’t care for the decentralization that is why it is way harder to reach to top 10 of an existing network than on a new network with the same reputation. People tend to delegate and forget.
Fixed commission val commission should be fixed by the network gov, and each validator should get “Fix+variable commission”