Huh? This may have been true about 30 years ago when Shimano introduced the freehub but that’s no longer the case. There are dozens, if not hundreds, of hubs that use the bearings that use Shimano’s style of freehub. I would agree that using a freewheel hub is a bad idea but there are lots and lots of other choices. Some of those choices even use more bearings to carry more weight than Shimano does. Phil Wood, for a very expensive example, uses 4 bearings on the axle, 3 of which are on the drive side. Most all boutique hubs use the same bearing set up.