Yeah I really don't get why they never went the route you see games like ff14 going where you can be every profession if you put the work in.
When you gained power benefits for having a profession it made sense to limit it, but not really anymore. I guess them watering everything down and making everything too easy to upkeep would be the problem. Since there's no real time investment then it'd end up making more sense for everyone just to be self sufficient rather than relying on others.