If Bitcoin falls from $50,000 to $30,000, then those who bought at $50,000 thinking of hodling is losing. But that price fall has happened in the first place because people did not hodl. So it is not the fault of hodling really. It is the fault of people not hodling. If only people hodled all the way, everybody should be happy because everybody is making profit. So hodling is really still the best option. It makes Bitcoin scarce in the face of a rising demand.
HODL is basically hoarding. If everyone hoarded something, then it would become super rare to obtain.
If Bitcoin is ever to become a money supply, a peer to peer cash system, how can people just hoard it? They would have to send it.
But why buy anything with it? That pizza bought in 2012 was a bad decision. Buying ANYTHING with Bitcoin is a bad decision if everyone HODL forever.