Stupid because the forward facing standing stance is wrong for mobility. Standing sideways is better for a fixed stance on a moving platform (e.g. surfboards, skateboards, snowboards, sailboards, etc). If you're forward facing then you should have active independent movement between the two legs (as with walking, running, skiing, ice-skating, etc).
I disagree. I own a solowheel and after the initial learning curve it became safer and even more intuitive than walking. IMO, the sidestance may be okay if one switches sides as to exercise the body and the brain both ways. In reality people stick to whatever their dominant leg is upfront. Feels weird and prone to skeletomuscular imbalances.
