You should watch more tackle play. All tackles get driven back, including the one you want to draft in the first round.
Watch will campbell against dallas turner or jared verse.
The issue is when your tackle gets driven back, and your interior doesnt provide a pocket to step up into, it leads to sacks. This is why the bears oline has been shit for years.
Here is your hero Ronnie Stanley getting pushed back nonstop vs. trey hendrickson
Again, ever tackle gets pushed back. Bears fans just dont watch enough NFL tackles to realize this happens. Braxton isn't elite by any measure, but stanley wouldnt be much of an updrade if any, and cost a fuckton of money.
I'd rather take a guy who's weak against a bullrush every so often than a tackle who has slow feet like kelvin banks and gets beat by speed rushers.