Good-Person
Captain Junkie
I agree, though not everyone is open to considering it an actual career, being a good youtuber involves a lot of skills such as marketing, managing your time and yourself and potentially even employees, being familiar with video equipment and software, editing, presenting, etcetera.
Youtube is considered a side business by many people, as there are majority of the Youtubers who do not rely on Youtube alone to make money. Just because a few Youtubers have become famous, it does not mean that all will be popular in the same way.