“No one seems to be able to find them.”
Nobody is looking for them. If people would take off their blinders and look around they will find plenty. I see them every day at the 6:30am shachris and the shiur that preceeded it. On the subway to and from work. At mincha in a midtown office. At the late night daf yomi shiur and maariv. Grocery shopping. In a pizza shop or restaurant.