That was one of maybe two or three data points, that confirmed my decision to pursue an industry job. Another was the average age of post-docs in the department.
And it was 20+ years ago, when there was maybe a bit more migration between physics and engineering, and not so damn many specialized tools to learn.
They say "luck is the residue of design," but I sure owe a lot to pure luck. I was graduating into a rotten job market, but got my first job through a friend-of-a-friend sort of deal. It was a small company where a jack of all trades could be of value, though the pay wasn't great. When things began looking better job-market-wise, my spouse and I moved to a new town.
I actually did teach a couple of courses as an adjunct during a brief period of unemployment. It was hard work because I was doing it for the first time. Now I'm back in industry, doing a sort of systems architect thing for a company that makes measurement equipment.
As for entrepreneurship, yes, I have a very small side-business making an electronic gadget, but it is for a very specialized and mature market, so it's not start-up material. The good thing is that I've actually learned a lot about running a small business.
The biggest, and perhaps only, barrier to me starting a start-up is that I don't have a good idea. I've racked my brain, read all of PG's essays, and so forth, and a compelling idea just hasn't assembled itself in my brain yet.