I thought this approach made sense early on in McDermott's tenure. Build a foundation of Chris Kelsay's (lol) and establish a team-oriented environment for your eventual young franchise QB to grow in.
I also thought the second half of that approach would be to start taking some shots on high ceiling athletic specimens once the the foundation was built. The McDuffie/Elam debacle seemed to fit that bill in 2022, but when that didn't pan out I think McDermott fell back to prioritizing football character.
That's not to say that the GM and HC being on the same page isn't essential, and that's the situation the Bills are in. But to my eyes, Beane is doing his job on the draft capital front, whereas the spending of that draft capital is hampered by McDermott's vision.
Random aside, but in my Madden franchises I always try to draft for potential over day-1 starter material. I'll gladly draft a strong 6'3" WR with 4.4 speed and below average Awareness and Catching, because I can coach those latter attributes up over time. You simply can't manifest raw athletic ability out of thin air in a 5'10" WR with 4.6 speed, no matter how good his head and hands are.
At the end of the day, the bigger, stronger, and faster teams usually overmatch the rest.