Hi
It's just the way they are.
I think the reasoning is LEDs will outlast the lifetime of the vehicle and certainly the guarantee period
I have mine quite dimmed for night driving but with fog and suchlike requiring the lights on in daylight they are fairly dark and I don't want to spin the know and then spin it back when it is dark.
8BD service tomorrow. 38,000 miles £260:00 quoted from Honda.
First MOT next year.
Merry Christmas