This must be a study in reading comprehension, and/or making an assumption
Bearings sealed, as the OP mentions. Think most of the C-10 crowd goobers in a bit of (not called for) grease when bearings are installed, on the front/rear axle shaft, or any components that may (or may not) come in contact with a wheel bearing.
Me? I add a dollop of lube on either side of front wheel bearings if only to reduce/eliminate corrosion between tire changes. Similar for rear axle. If you doubt me, look at the radial grease streaks on my tires/tyres/tars
Rick