A320 Dont follow flight plan

to ok, if you say so, no worries, if it suits you to have USR points. I’m still curious to hear your explanation of why this is a bad advice, and why they are there… I might have missed something.
Because, maybe it’s a software bug, but every time I leave them, the plane turns around to go to the first USR, and when I delete them from the flight plan, the plane follows my flight plan from A to Z.