Met many guys and outfits like this.
most are poor at d&d but get by, but can skim to a reasonable standard.
i was on a site in hull about 4/5 years ago and I was 23, there was about 6/7 gangs, a big school 4 big staircases and toilets were float and set, frames in ready to go, have a guess who did them, I was youngest guy on site too.
same with changing rooms, first time I ever used OCR, nobody wanted it or could do it, went in on my jack on a sat morning chucked about 40m @ £6 pm2 got it flat and scratched it up I was in van coming home @12.30
i started off screeding and used to barrow 2/3 ton into houses keeping 3 old schoolers going, if the barrow wasn't full to brim I'd get sent back out after a bollocking with "don't fetch noddy barrows in" ringing in my ear.
the guy who trained me was an very old school plasterer and very well respected in the village and the town, his words when I first started skimming after a year with him were -
" just because you can skim, your not a fooking plasterer, until you can do every aspect your not a plasterer, if I hear you telling anybody your a plasterer, I'll fooking out you for being a lying little c**t"
true story, he was 60+ and 5.5ft I was 18 and 6.1ft and I absolutely shat myself, really good guy thought, taught me well and wouldn't have changed a thing.