In my book it's all a matter of courtesy to the vehicle occupants behind
...Nothing to do with being courteous to others behind and not dazzling them.
We're not talking about night time driving just the convenience and safety of brake hold being on before you put on the electronic handbrake.
You don't need it if you are only stopping for a short while, so your hand shouldn't have to leave the steering wheel to activate the 'handbrake' and it would stop you from having to look down for it if you needed to anyway.
I can't see why people are against using it as it's a safety feature that works well.
I use it all the time obviously but it doesn't stop me using the 'handbrake' at all.
It's not a one or the other situation.