Most teams build a car that both drivers can drive.
I simply don't buy the idea that it makes this much difference. Sure, you can set up a car a bit more or less to a particular driver's preferences but a good car is a good car, and a bad one is a bad one. It doesn't make second best car to midfield difference.
RB has always done this. Just look at the past.
There has never been a gulf like this before. Even Gasly last year was closer than this.