Earlier quoted context omitted.
What do tertiary degrees get you? If you're an employer, why would you want to employ these people?
Most notably computational finance and research in the natural sciences (material, biochem, physics) all require tertiary degrees since those courses are simply not available at the undergraduate level. The benefits of hiring these people by the financial and the pharma sector should be obvious.
Notably, if the field doesn't objectively require a very high level of domain-specific knowledge, but rather a general baseline command of a broad topic, eg. software development?