Albert Breer lays it out well in this article (scroll to near end, after the Brady/Patriots drama) -
https://www.si.com/nfl/2020/03/23/tampa-bay-buccaneers-scout-tom-brady-diggs-hopkins-trades
We paid what was necessary to get the player we wanted. He's a great fit on many levels and makes a ton of sense. As others have said, not every GM is Bill O.brien... sometime you actually have to pay a price to get something valuable.