There's that, and the fact that a lot of (or most) soundmen don't care one bit about bass tone,
as long as it sits in the mix. Every time I convince the sound God to accept my amp's DI, I give him a post EQ signal to begin with. If he bothers to have a look and see that the button is on post, he will usually go nuts, if he doesn't even look he's usually happy.
I have a couple of pedals (Boss graphic EQ and VT bass) I can use to radically alter my clean tone. Combined with the onboard EQ, I can get pretty much anything I want. Never, EVER had a complain as long as the pre/post button is in the "correct" pre position.