Why would you prefer a player like Lautaro Martinez to play in Saudi Arabia? He's still very good and he's one of Inter's most important players. If Inter are in a tough spot does that mean they should sell all their important players? Won't that put they in an even more difficult position? They're not the only club with debt and they can manage it.
I believe Inter will reject an offer for Martinez except that offer is too good to be true. Paying off their debt is not the only focus of the club and selling player is not the only source of income. Things are bad for Inter, but not as bad to an extent where they can't even keep their few big players.