There are a handful of reasons why.
1) The rules of petitioning for new groups remain unknown and seem unknowable--
a. two months ago when I used the 'help' function, the admin never responded. Advice came from other DUers in much the same way as jury comments--collectively they were incoherent and contradictory recommendations of how it was done back in the good ol days.
b. this past week, as the new ATA went active, I asked again, and again I got no response, although this time I was certain that Skinner had seen the request as he answered that deleting groups was more a priority.
2) It's unclear to me where a petition should even be posted to receive recs.. It should be posted where people who would respond positively to it could see it and reply in support of it--
a) It could be posted in MHSG and there it might get the mystery level of support. But, if only MHSG supports the petition it seems that there is less need for a new group and more need for a rebranding / repurposing of MHSG.
b) Posting it in GD means subjecting the petition to significant mischievous traffic. A petition isn't a debate. Non-support of a petition doesn't require a comment, but everything in GD attracts contrarian commentary--orthogonality is a major feature of GD.
3) I am not a star member, so I'm in a disadvantaged position to be asking the Admin for favors.
4) The adventure of blazing a trail through uncharted wilderness to discover and by chance fulfill the still and as yet unspecified requirements for petitioning a new group, isn't for me.
I wave my interest in that effort to someone with more persistence in the face of passive dismissal. Having my effort ignored and finally sent into offline oblivion isn't good for me (Skinner has already answered in ATA to another poster's question about access to archived Meta with a "your fucked" statement).
Personal futility triggers the worst of my symptoms. Ending up feeling like a fool at the end of fool's errand puts me in a very bad space. My higher functioning modality can intellectualize that distress as a distortion caused by pathological sensitivity, but when I'm triggered I can't reach high functioning.