A lot of the advice on those older threads is about quick-release hubs, where they're meant to have the bearings ever so slightly loose when off the bike, because the QR will squeeze the ends together when closed. It's kind of a hack but one that was accepted for generations.
Now with thru-axles, the bearings ride on the axle with no side load to speak of, and usually they're cartridge bearings with no adjustment possible anyway.
So confirm for us - what is the model number of the hub, and is it quick-release?