Threads wear out even when installed / removed by hand.

The factory says to install dry, this leads to friction and galling. ( Galling occurs when 2 of the same metal types rub against each other. In a mixed metal situation, softer metal will wear away, but in a similar metal situation, both parts ball up. ) I use oil on the threads but not on the taper / ball seat.

Another issue is rust. The lug bolts extend through the hub, if the exposed threads rust they will damage threads as they are removed. Add in grit from brake pads and you have an abrasive mix.

Failed lug bolts / studs are not always the fault of the last person that touched the car as bolt wear is a progressive failure. It is possible to properly install a bolt by hand only to have it snap off / cause damage when properly removed.

If this is a front hub, I'd just replace it. If rear I'd replace hub only if the bearing is due for replacement. Cleaning with a tap won't help as this removes metal that already isn't there. I'd use a Helicoil if there isn't much metal around the hole or a Time sert if there is room. If yo use a Helicoil, you will need to be careful when installing the bolt as if the coil end lifts, things will jam.