I'm going to hazard a guess here and assume you did not notice the age restrictions to this site. Oops, insult to injury.
No one FORCES anyone to spend money here. It is a free site, period.
If someone chose to spend money, then they made the decision and should live with it without whining about it. If someone wants to try and score lower yeah eventually they might want to buy clubs but they do not have to, you can be here for 6 months and not spend anything and still make good scores. I am a Pro like you say your Dad is and only bought one 2 dollar club and I still score 33 - 36 on 9 holes.
Your arguement just doesn't hold any water what-so-ever sorry.
The site is here for people to try it and enjoy it, if the enjoy it typically THEN they might spend money, and its an optional decision that they make. Nothing is ever asked for and you do not have to spend money first and then try the game after.
Since you dont seem to enjoy it, you might want to try and find another site OR just stop making so many negative posts and practice and get better at the game like everyone else does, it takes time you dont shoot 30 in a couple of weeks or a month.
Good luck