Yes, they are.They are not. I'll explain it again. If someone doesn't want Glock to offer a MS then that means they don't want Glock to offer a MS. If Glock doesn't offer a MS then no one can buy a Glock with a MS. There is no in-between. You can't say you don't want Glock to offer a MS but then turn around and say you are okay with everyone else getting them.
If that was the case, then the individual would say "I don't want anyone to be able to have a manual safety on a Glock."
No one here has said that. Nobody. And your poll choice doesn't say it, either. And I suspect that nearly everyone who picked that option in your poll really don't think that "nobody should get them." They either didn't read it, or are confused by the poor wording.
There are aftermarket smiths who install them. Not wanting Glock to install one does not equate to "I don't want anyone to have one," because there are ways to get your thumb safety on a Glock, even if you can't buy one equipped.
This is very simple English, Dave.