Prince(2)
Dont equate bigger DB to bigger salary, such is not true at all. I think the skill you want develop is your "analisys" skills, i.e. soft skills, rather than your hard skills (tools).
If you give a carpenter an order to make a table, do you care if he uses the backend of a screw driver as a hammer? Nails in screws and licks on the paint? No, as long as you get the table you want.
What you say is definitely 100% for small business and the self employed. But big companies are different. The person who decides whether someone gets the job first up covers his own arse and that means the applicant have the appropriated qualifications.
I think that possibly the main potential income from being an ITer and Big Stuff is being able to move to a more managerial role in the company.
Years ago the product manager in an insurance company would have worked his way up, probably started work at age 17 and would have zero formal qualifications. Today, they have to have some sort of degree or they won't get the job. The fact that these same people can't find their own bathroom does not matter.