He's not worth that amount now. What he'll be worth in 10 months or a year, not even professional scouters know.
Look at Salah. In retrospect, he was worth 2-3 times more than what they paid for him and that was revealed pretty fast. Everyone was like "wait a minute, they have a home run here".
That's what we need to understand. The value of a player is very hard to determine at a given point when the parameters that obviously dictate it (performances at the top level) are unknown. Because if the outcome of those setups would be known, you'd be talking about players like Salah, Mbappe, which are unobtainable for a club in our position from all points of view.
We don't know how Raphinha will react in a CL match with a bigger, better team behind him. Receiving passes from Pedri, passing potentially to Lewandowski, and stuff like that. Too many wild variables, which will trigger unknown outcomes.
What we see now is a bullshit BBZ approach where everyone throws dirt on every signing, based on the true but superficial pretext that, statistically, most players don't rise up to the potential. But nobody has any clue which does and which doesn't.
Right now, we don't know much and Raphinha for 73-75m would start his affair causing skepticism. Including for me. That could wash away pretty fast if the guy comes in and plays at a world class level. Nobody knows if that will happen or not. That's the bottom line.