Hi brother I just love cannabis and everything around it, all that was mentioned and then also good time management. I know a lot of people that would much rather go for a few beers than to finish their trimming.... and a whole lot of other stuff not trying to beat around the bush, but it just is what it is.
I already know some old cats gona get suuuur gat when I say this, cause the cannabis industry revolves around status points and obviously no one would ever be able to know more than these older growers, same as the weed back in the day being soooo much stronger than we have today I strongly discourage talking to people over the age of 45 about growing. I talk to some "serious seasoned growers" and they bombard me with questions before I am finished answering one question they wana ramble off the next just trying to "catch me out" or some school yard nonsense.
Majority of people who get into weed is cause they like smoking it. I am not a weed guy, I am a plant guy. My background is in horticulture, permaculture, botany and mycology. That's what I do in my spare time. I am so fucked in the head by plants that's all I do all the time, so to me the plant is soooooo much more than just the cannabis we smoke. I will talk and have long form discussions about it day in and day out, and not just the cannabis part, the rest of the plant too. As soon as the person I am talking to takes the "I'm gona teach this guy a lesson" approach, they start talking to themself. I am not into cannabis to be cool or to be the best, I just honestly love working with plants. Trimming cannabis, to me, is a huge pleasure, I take extra time to investigate and do things most people would consider a waste, but to me that just shows a person validating their own preconceptive laziness. For example - I run living soil that I build and maintain myself, but when I talk about it every second comment is "that sounds like a lot of work" or "you do too much, I only do this..." and best of all is I never even ask, they just feel the need to chime in. As things are right now I am looking for ways to better what I do, I wana do more, cause the amount of work I put in, is already done. when doing real living soil you literally doing the least out of every method of growing, it just takes work to get there. once you there it's almost no work, so when a "serious grower" wana tell me I do too much, they can go fuck a hobo.
but yeah genetics make a big difference too, I would trim for others too, not a big deal to me don't even have to reward me with weed but I would never say no, just don't accept payment for it. I got only one rule, I will not trim shitty weed. I grow a plant that's too leafy/airy for my liking I just cut all fan leaves that don't have trichomes and the rest goes in the hash bags. So yeah genetics can make the biggest difference there, and then you can add to that the fact that a 1st time grower realistically faces the possibility of growing a top tier genetic and it coming out airy and leafy cause of grow tech and all that, even seasoned growers run into this when they still figuring new genetics out. Harvesting a healthy plant over a sub par or unhealthy plant can determine the trim job aswell, have had failed plants just go straight into hash bags, covered in trichomes but bud forms was off, cause I fucked up the grow, then grow that same pheno and produce nice rock solid nuggs, those I trim
hope this wasn't too much of an answer