Yeah, perfectly legitimate in the “minds” of some people... :-)
I’m not trying to say they exist. I’m saying that physicists have found a number of ways they CAN exist when using the physics of general relativity. Or, putting it another way, it’s those who say they cannot exist who are ignoring the known physics.
The universe is probably a much stranger place than we presently realize, and we now know it is a much odder place than we thought 100 or even 25 years ago.
Don’t assume that because something is really strange it cannot for that reason exist.