It's something of a mis-guided comment.
Properly specified HID headlights, fitted in a legal fashion are fine.
The problem is numpties like Kells fitting cheap kits to cars without headlamp levelling systems, with no headlight washer systems, behind lenses that aren't designed for HID units.
These are the cahnts dazzling other road users. 'upgrade' kits for fitting HIDs to older cars should be banned for sure.