1. If you're paying $3k for a rear axle bearing job, your getting fleeced. I could ship a Harbor Freight press, fly down 1st Class with the parts, spend a half day swapping OEO parts and still clear $$$$ at that price. Perhaps I should? Looks like the Lexus dealership got full pop Lexus retail on the parts and over $250/hr labor for the 8hr job? It should be a $1200-1500 job w/parts similar to knuckles on an 80 Series, timing belt/starters on a 100, etc.
2a. These are trucks used a fair amount offroad. In the case of my personal 200, 1000's of off-road miles each year with a heavy load and a heavier foot. I don't consider anything a 200 does "rock-crawling" fwiw. Doing Hells Revenge or Poison Spider Mesa isn't rock crawling
2b. I think many Cruiser owners in group 2a are on fact DIY folks based on the parts we are selling them. Perhaps they have labor and builds done by shops out of convenience or in the case of rear axles the SST needed to do the job.
The 80 needs a knuckle overhaul in similar mileage, the 100's have the same RAX bearing config. Nothing shockingly new.
Fwiw, I've done more bearings in the shop than radiators, in fact I'm at 125k? and still on a stock radiator. And I've seen 200's with light use get 250k on stock bearings... it's not exactly a leave you stranded deal.
10% cost of the of the vehicle for a decade of moderate/severe service. I'll say thats great!