Of course the more we sell a player for the more we can spend on a replacement - as
@TOXIC BEE said in the message you replied to. We probably have a target price in mind for every player but we can aim for a higher calibre of player with more money in the bank. Whether it's the club's strategy or not it's also the foundation of PSR and its replacement.
I agree people can seem a bit too emotional about it - like someone's low-balled them on the sale of the house that they built with their own two hands!!
The discourse is all part of the pride and oneupmanship of your club's status vs someone else's surely (we "won" the Wissa sale because Newcastle was desperate and we were smart, we "lost" the Archie Gray deal because we were opportunists but a bigger fish came along, and so on) it's just also just a crude way of rating that player (how good is Thiago? well I wouldn't sell him for £70m that's for sure). It is a bit OTT at times but it's all part of transfer discussion.