Maybe everyone's eyes are different, as I, like you, have never been bothered by brake lights staying on.A car leaving full beam on can be dangerous. Being behind someone with their brake lights on can be irritating if it bothers you. Have to say it's never bothered me. I do use my handbrake when I'm going to be stopped for a period of time but that's more so I don't have to keep my foot on the brake. Didn't even realise folk might be effected by my brake lights.
If you're behind me at some traffic lights and it does, keep a pair of sunglasses handy as that's how the car behaves