So many things you just said are wrong. The control arms are 100k mile parts, and you can easily replace them with Unplugged Performance versions for under $1k.
Would you like to see the bills I got from Tesla? I've shared them before and I'm happy to do it again.
(Also my Tesla is 74.5k miles, so nowhere near 100k)
-edit-
I was a victim of misinformation from my local EV repair shop.
https://www.dormanproducts.com/pages/products/oe-fix/article...
The prices you are talking about are incorrect but there are 3rd party parts now.
And I have no idea what kind of driving he's doing to spend 2-3k$/y . I got Front Upper Control Arms replaced under warranty, exactly once, in the lifetime of my 2019 M3 (also Fremont-built). I do a yearly inspection just to catch issues before they have a chance to become really problematic, but for the past 4 years I've always been told that "the car's underside is just perfect, there's nothing wrong with it".