Can anyone with more context explain to me why a rational person decided on this? It's Biblically frustrating for me because 9/10 withheld numbers are spammers or scammers and I don't want to pick up the phone to them but 1/10 it's my local doctor's surgery who I can't ignore. It's such an antisocial thing for doctors of all people to do, but it seems to be common enough people across the world have to deal with it.