Interesting take but it changes the game into a whole new game.
The current game is a test of endurance intelligence chemistry.
With infinite subs, endurance and intelligence become battery packs. And chemistry gets replaced with playbooks.
a.k.a. American football 🏈
I know this is a stupid American take... but every time I watch soccer, I cannot figure out the limited substitutions rule. Look how tired these players are. Just let them substitute. Think of how slow basketball would be if the same players had to play 48 minutes straight.