And the way it works covers most of the objections, as a course has a set time period to complete and there are standard tests during that period as well as exams at the end.
The Open University is accredited in the UK as a full university, actually it's Britain's largest university based on attending students.
The main thing that's missing is attending lectures and it's fairly few actual work situations where that's a relevant skill.
The bit missing is that it's not free, though tuition is heavily subsidized by the government, something I found out when I took a couple of courses and wasn't covered (because I'm not British).
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Reductionist and proud of it.
Being ignorant is not so much a shame, as being unwilling to learn. Benjamin Franklin
Chase after the truth like all hell and you'll free yourself, even though you never touch its coat tails. Clarence Darrow
A person who won't read has no advantage over one who can't read. Mark Twain