That's not my understand of scrub as it relates to bearings. Scrub has little effect on bearing unless your adding 2 or 3 inches of spacer, excessive camber however will trash a bearing much quicker. Scrub is designed into a steering system to get a certain performance attribute such as easy low speed steering such as parking or high speed response. Under your assumption anyone changing to a late model tubeless wheel would be at increased risk of trashing bearing. Stock wheels have a 5/16 offset later model wheels have a much larger offset up to several inches. I think we would have heard a rumor about not changing to tubeless tires were that true. These spacers only change it one inch which ends up being next to nothing is the scrub calculation.
