since dirt and water intrusion is what destroys bike bearings
Pay attention to this:
excessive preload can have a sharp reduction in life due toincreased load on the rollers which in turn increases friction, damages the lubricant and can cause high operating temperatures.
https://www.bearingtips.com/preload-...h-is-too-much/
Notice how rapidly bearing life decreases as preload becomes excessive.
Too much preload will destroy the best grease -- and destroy the best bearings -- much more rapidly.
Remember, preload increases as you get on the bike, put weight on it, and ride it.
Also notice bearing life is almost the same at no preload as optimal preload. However, it reduces quickly and dramatically as preload gets too high.