Look, Wurm is too vast and big to make one character that can do it all. There is simply not enough time to skill up all of the useful skills (however you want to define that). So, if I have 2 toons that are both digging, they can both queue up actions, or level, and I get double the amount of dirt dug in the same amount of time. Plus, my priest can do his casting, praying, meditating, or make planks or whatever. I can't run more than 3 toons at once due to a crappy computer, but I can get roughly 2.5 times as much done with my time by running toons.
Contrast that with having to communicate with other people about what needs to be done, overcoming the inherent difficulties of communicating a vision in your head with someone who might not view it the same way, or language barriers, or the myriad of other obstacles. I'd rather use my time in getting things done than trying to explain to someone what I think should be done and how. And as soon as you think you've explained it to them, they have to go, don't show back up for a couple days, forget everything you've talked about, and so the process has to start all over again.
Case in point. I hired 2 people to help with a project around the first of the year. They had advertised in classifieds, and we struck a deal. I built them shacks to use for sleep and a larder with food and some left over snowballs, gave them perms on a couple wagons, explained what I wanted, and set them to it. One only worked about an hour the first day, and over the course of 4 months has dug a total of 15 lg crates of dirt. The other, said he had a quick errand to run and would be back shortly, and I've not seen him again. Wasted probably 2 hrs or so getting them set up, hours that I would have rather used wurking. So yeah, I'll stick with my alts thank you very much, and you can go play with your one toon and rely on the unreliable masses to help you out.
I don't see why you can't just go play with Zueletak or whatever his name is, that has the NO ALTS village that I see him advertise. If you want to skill up one toon in everything, by all means, neither I nor anyone else, including the devs, is stopping you.
BUT LEAVE MY ALTS THE F ALONE!