Bearings - What they don’t tell you

I just replaced my bearings with Bones Reds.

Most of my bearing knowledge is from RC Monster trucks and sure; these are the cheapest skate bearings but the quality doesn’t come close to the bearings I run on my truck -fully sealed bearings that run 20-30thou rpm-

My truck bearings aren’t expected to carry 80kg and G forces = up 500kg but they do have to deal with heat and impacts that bend titanium and split 75/75 Al.
I imagine economy comes into play with skate bearings though.

When it comes down to; it I’ll just replace my skate bearings with the next higher rated ones when these fail. Which is more likely to be due to rust not wear.