So you can rent clubs on mobile. What is the big deal there? So you can get into coin rooms. What is the big deal there? Coins need to have a value. Can you buy balls with them? Can you purchase a level 101 putter?
The question is whether coins are pointless. The answer is that, yes; they are pointless. They have no value so there is no reason to collect them, unlike credits, which have value.If coins could be traded for credits they would have value!
Think of the fun in coin rooms where the winner picked up VALUABLE coins. Think about the quitters who would give up valuable coins or never start rounds where they might lose coins. Coins need value!