SEO is clearly the most valuable work. Unfortunately, it's something "so mundane", that anybody could do it.

I actually think you have it backwards there. The reason people aren't engaging in this activity is because it is the opposite of mundane. It is confusing, difficult, and requires previous skills.

General Evidence: There are lots of postings for Search Engine Optimizers, and they all want applicants to already have experience doing SEO. If it was something that was so mundane that anyone could do it with a couple hours of training, what you'd see instead are "no experience necessary" job postings for SEO where the company is willing to take an hour or two to train a schlub that they can then pay minimum wage too.

(Speaking of minimum wage, if you guys are spending a significant amount of your time doing menial tasks like moving furniture, it might be time to get a schlub of your own. You can pay someone $8/hr to do menial tasks 20 hrs/ week, for a total of about $8000 / year.)

Personal Anecdotal Supporting Evidence: I clicked on your link, and the thought in my head wasn't "oh, this is too mundane", but rather was "wtf?? This looks super-complex and confusing. It must be the type of thing that "computer people" know how to do. Not something for me. I don't have the knowledge or skill-set"