The problems I find on cheap pumps installed by cheap homeowners is that they run dry, they freeze, and no- one ever changes the start capacitors, or oil and check the start switch. Or pressure tank.
I have few booster pumps that regularly threw their mexican springs off the start switch, then shut down on overheat.
But its only a short fix with better springs and little lube. I drilled 2" holes in some of the plastic motor caps in order to check and oil the switch.
finally fried the motor on one. MFG wanted 600$ for the motor. good joke. To make sure they screwed you, also milled a special end on the shaft so no off the shelf $95 motor jet pump would work. Since rotors usually last forever, I bought the cheap motor and re-used the old rotor with the "screw you" shaft. Still working after 7 years.
As to seals and bearings, I have a hot pump with a 2 speed jet pump type motor. Lots of run time. Got 18 years out of that cheap motor by changing the bearings and seals a few times, and would still be running if the case had not rusted away. But changing bearings and seals seems to have left the national phyche years ago.
Better and more overheat cut outs would probably make a sears pump work forever, makes the guy figure out the issue.