Not sure that’s true. My understanding is the lowside happens when the tires lose traction while cornering so the bike skids along the road on its side with rider often beneath it (or hopefully behind it).

The highside happens when the bike is cornering in a skid but the tires regain traction but he angle of the bike is insufficient for the speed and the radius of the corner. This regaining of traction causes the bike to flip towards the outside of the corner, throwing the rider over the high side.

A death wobble happens on any road (ie not just when cornering) and you hit a bump that the suspension can’t recover from which also causes a deflection in the steering. The action of the bike attempting to gyroscopically self-correct, coupled with the rebound of the suspension causes the bike to go into the wobble from side to side (if the bike has a steering or suspension flaw). You eventually get thrown off the bike either side.