Fake Tennis coach

I just had a lesson with a “coach” , he took me in some fancy hotel court wich was his way of selling a status or to avoid common fields we’re he might be well known😅, anyway, the moment i told him that i dont want a coach but only a partner to hit some balls he became competely white. Zero knowledge zero technique. But he might fool some really beginners and make still good money. What to say , gg if it works 😂 smart man