I won't try to preach to the unconverted. Here's my counter argument.
First point..
They are not illegal!
Illegal describes an act that is unlawful and also a criminal act, such as drug trafficking. It's not a crime I'm afraid.
I find the ones that dazzle me are always fitted to newer cars. Usually BMW, Audi and Mercs. All factory fitted. Take a closer look the next time you're blinded.
I never put them through an mot as I fitted them after it was done. However, it's no more than a five minute swap over for the bulbs if indeed an issue was to occur during mot. The ballasts don't need to be removed.
Not once did they trouble other road users
I'll qualify this earlier statement with some facts as I see them.. In ten months of driving approximately 50 miles a day, no-one ever complained by flashing their lights at me for dazzling them. I commute into the biggest city in Britain and nobody held their hands aloft to their eyes and swerved as though blinded and the drivers and occupants of the myriad of oncoming police vehicles, and foot patrols, I passed during that time never so much as batted an eyelid in my direction or pulled me over.
My new car has factory fit Xenons and the level of engineering that's gone into them shows there's a lot more to it than just the HIDs themselves. With the self levelling and washers, built into the headlight itself, it's no wonder that replacement units are £400 each!
F's and TF's aren't new. This we know. You could probably buy one for less than those lights cost. The upgrade I did cost 25 quid and thousands have been legally sold in the UK. They're a doddle to fit. What's not to like?
Those lights allowed me to see further and lit the road ahead more clearly for me to view. That folks, amounts to an increase in safety for all. Well, that's the way I see it anyhow. Excuse the pun.
My clio sports has factory fitted, officially recognised xenons. Call them 'legal' if it makes you feel better. Anyway, I'll go video the lights and upload how they look here for us all to see once it's dark. Should be interesting.