This is a common approach (very close to the norm for the most successful startups and companies I have worked with in my career), but I strongly disagree with this: "go back to university to learn business basics (finance, marketing, management)".

You will learn all of that on the job by the time you make it to Principal Engineer, Senior Sales Engineer, Staff Product Manager, or Enterprise AE in the American/Israeli/Indian and Chinese startup and BigTech scenes and especially in Enterprise SaaS, Cybersecurity, Hardware, AI/MLOps, Infra, and other high domain expertise but high revenue and exit potential heavy segments.

Also, a plurality of VCs in the segments I mentioned above tend to have learnt on the job and later switched to VC after successful exits and/or head-hunting.

If you do consider going back to school - only do a graduate research driven CS, EE, CE, or ECE degree program like Stanford, UIUC, CMU, GT (their online program is as good as on-campus with the right courses), UT Austin (their online program is as good as on-campus), and a handful of others.

the most pragmatic approach indeed!