If you proactively replaced all the parts the manufacturer specifies at the the intervals they state it would be crazy expensive - which is why hardly onyone does it. Keep up with the common consumable stuff - oil, brakes, belts, hoses...etc. and you will be fine most of the time.
I have put 200,000 - 250,000 miles on a lot of vehicles in my life and I've never proactively changed wheel bearings, or anything similar, never had to. A lot of things can fail and leave you stranded on the side of the road, but do you just start changing out starters, alternators, water pumps, power steering pumps...etc to make sure you never have an issue.