Wow that's quite a thread to wade through, but I didn't want to skip anything. Sorry this is longer than I intended!
I'm an assistant Beaver Leader. I work F/T in a professional position. I'm the last person on the planet who thought they'd like working with small children.
I volunteered on odd weeks to begin with, usually when my Beaver DC had a hike, and because I like walking. When DC moved to Cubs, I volunteered to be a sectional assistant at Beavers which meant one weekend's basic training and a DBS, no uniform. 10 months later I was in uniform and am now nearly 7 years in the colony and I'm well north of 50. I'm likely autistic. I can't organise stuff easily. I used to say I couldn't bear dealing with loud groups of children, but mine turned out autistic and I figured if I could cope with 24 Beavers in an echoey hall I could cope with one stroppy DC. I was right.
What I didn't anticipate was how much it's helped my job. The need to be the adult in a situation and just Get On With It has bigger effects than just managing to survive an hour a week of small smurfs running about or learning to light fires or put up tents or cook. I find dealing with groups of recalcitrant adults at work fairly straightforward now and wish I'd joined Scouting years earlier. It was a case of making time to do it, and suddenly I had some. (Ok, sometimes I've changed into uniform in the disabled loo after only just getting back in time...)
I'm happy being assistant. I don't want the leader position because that might be a challenge too far, but because there's two of us working together we can take weeks off if necessary and plan around absences. As a PP said up thread, I can come up with ideas, and make sure we're covering badges, and I'm in it for the long haul. But it shows that if you can't or don't want to do the main leader stuff, you don't have to! Just helping on the outside stuff is great as that's where we need the ratios.
And once a group grows, then a good district leadership should make sure that help will be found. We've now got two of every section and at least two uniformed leaders per colony/pack/troop.
Stroppy DC is now an Explorer, and learning life and social skills there. I really wish I'd been able to be a scout when I was young but better late than never! And it is fun. But no way it is just an hour a week once you're in uniform!