we had to balance the books because we signed ronaldo, we signed way too many duds so results started to fade and started to overpay our players. you seem to forget that paratici brought back bonucci on high wages, raised the salary of tek, sandro, rugani, extended with mandzukic, khedira, signed useless ramsey, expensive de ligt (good signing but still fucking expensive), while he couldn't even sell dybala, who was a proper player with actual market value back then. the whole squad was unsustainable under your idol, that's the first thing you have to keep in mind.
still, it doesn't mean that juve had to pay 80m for fucking arthur. it wasn't the only option. barcelona wanted pjanic for years, psg also wanted him, we could have sold him plain and simple. yes, the fee would have been significantly lower, so what. not only half legged pjanic was a superior player to injury prone, unprofessional arthur, the costs of that deal are unforgivable. we also had a squad full of players with actual market value, including dybala, ronaldo, de ligt, sandro, bentancur, demiral or even rabiot. downsizing instead of further increasing the costs of the squad when covid hit the whole football was an incredibly dumb decision. it was already explained on tuz countless times how these stupid plusvalenza driven deals only defer the costs to following years, so only offer short term semi solutions to much longer issues.
so the club had to balance the books, but not by the dumbest deal ever. if you can't see in 2023 how signing arthur was a terribly bad deal then there's really nothing to add