Rodrygo was paid 45mil according to transfermarkt and Camavinga has been seen as a proper talent for quite some time, despite his age. In FM he was always the best of the best for example.
You can be sure if Inter paid anyone in that range or had in a squad a talent like that they would play them.
Lautaro is, arguably, less talented than Rodrygo and yet Inter's been relying on him for a few seasons now. He was paid less as well.
Kovacic for example, Inter paid 10-15 mil for him iirc, and played him. No loans, not an understudy, a real starter.
Any team would play guys like that. Rather, the trick is, imo, to recognize a gem before anyone else does or bring him through ranks. That's not what RM has done with those 2 guys imo