Your reasoning is pretty absurd. Look, we all know YG is incompetent, obviously in the ideal world Lisa's solo should come in early June, so everyone has time to save up for group CB later. But given the situation now, it's best to release Lisa solo before the group CB.
We all know the biggest single contributor to BP album sales is Lisa's China bar, so if you push Lisa's solo to the end of the year AFTER the group CB, we can be sure her China bar is going to boycott the group CB and the sales will drop anyway.
Compare that to having Lisa's solo released in July, she blows it out of the water, and attracts millions of new fans who will fill the void for Lisa China bar's lack of purchasing power for the group CB. I think this is the best course of action.
To sum it up, delaying Lisa solo again will do more damage than releasing it in July.