Because I wanted to minimise the risk- they don't always give you points. Sometimes they just make you take the tint off on the spot.
It's very simple- I'd rather have frequent police checks and have people going round with tint on their windows, than have no tint and less police presence. I don't see the point of saying why it should be allowed, because I don't see why it shouldn't be allowed in the first place. There are many more important safety checks they should consider, such as old tires on vans, and repairs. How many cabs do you see around with a cloud of smoke trailing behind them?! That's what the police should be dealing with, not window tinting, which is a minor issue.
It's obvious that you are against tint, and I'm not saying we should have people going round with 5% tint on their windows, which looks like this:
What I'm saying, is that some level should be made legal, such as 35%, as shown below:
You can still see the face of the person, but the car will not get as hot, and it definitely looks a lot nicer this way.