They over-treat, to the extent MCU's fail and people pay ~$5k to replace what is sometimes speculated to be rebuilt/refurb units. Over-treatment on the control arms is arguably worth it.
The control arms got better around the time AWD showed up, I think. They're jointed, instead of rubber bushed. I'd happily pay the ~$500, to swap those parts even if not worn. I think Tesla should sell them direct to customers. What you describe does not sound like the ball joint in the upper A-arm, that caused a suspension to disconnect last ~June (dirt roads).