There is a legal minimum standard for vision to be able to drive in the UK (basically you have to be able to read a number plate at 20 metres, not have double vision, and have a normal field of vision in one eye.) The punishment for failing to stop driving if you fail that is a £1000 fine.

People with serious cataracts shouldn't be driving.

If people with 20/20 vision are having trouble, I'm sure that people with diminished eyesight but above the legal limit have it worse.

I'm also uncomfortable with the idea that we should ban more people from driving just so others can have excessively bright and sometimes illegal headlights.

I have implants after cataract laser surgery with now 94% vision. Like with every other laser surgery the problem of halos persists for the rest of your life. As a small person in a small car I have repeatedly been forced to stop at the curb until the halos reduce enough to be able to reliably drive. SUVs are the worst offenders in this regard. This just to say that people with their cataracts cured and a really good eyesight are still majorly impacted by this.

Edit: I have no problems with incandescent or the old Led lights.