Depends on the threat and data to protect. E.g. if I'm held at gunpoint and all I can lose is a bit of money, I'm probably not giving a duress pin. But if I'm a journalist protecting my sources and family, I would.
A more practical approach for me is to put in my birthday as duress pin. So if some bad actor or the police takes my phone and tries to guess the pin, they'd rather enter the duress pin than the real one.