I would say that normal doesn't exist lol. In a specific group of people there is always a threshold of various social,personal,economical, behavioral things that happen with somewhat reliable predictability and that is what is considered normal.

Wearing only a speedo and a cape with a parrot on your shoulder as you prance and skip around would be considered abnormal at wallstreet for example. Wearing a suit and a tie at a westcoast startup company would be abnormal for the same reasons as would shorts and flipflops at a bank's board meeting.

I think people mean "normal is subjective" when they say "normal doesn't exist". Still, you can objectively measure standard deviation to measure normal perhaps the right term is relative instead of subjective?

I believe normal exists. The lie is that normal is necessarily better than abnormal.

It does exist, but it is not at all like what we think it is.