Cash is very valuable in this game. I dont understand what are you talking about
In lower levels everything is very important. You are low on every resource. I remember my best player got 16 days injury and i had almost no red packs. That was disastrous. Even that poor cash was somehow important when you need to built all these facilities. But than at least transfer market wasnt so ****ed up like it is now and you can buy some good players from it with minimum tokens.
In higher levels nothing really matters. I think nordeus 10 years ago cant imagine that their game would be so popular and that after those years higher level players would be abandoned.