Dallas would be giving up way too much. I don't know what the official trade chart would say but I look at a deal like Deshaun Watson where Cleveland gave up 3 firsts and like 4 other picks, had to sign him to a fully guaranteed contract, get him unsuspended, and look the other way on a sexual assault habit.
The Watson deal was ridiculous so maybe a better comp is Russel Wilson who netted two first-round picks, two second-round picks, a fifth-round pick, and a player or two.
Folks may not like Dak but he is worth way more than basically some random team's first round pick.