> Mechanical engineering projects are too costly to be undertaken casually in the first place.

Yes, because of the implications, as the parent said. Just making stuff is cheap these days, that's not just true for software. You don't have to build a factory, if you want you can even outsource the actual construction entirely if you don't want to go through the trouble and remain flexible, just like "cloud computing" using startups.

> It only takes a few minutes and some easily self-teachable skills to start serving HTTP traffic;

Because people do it without caring for or knowing the consequences.

> now it's going to take a few months and some lawyer hours to create the bureaucratic cover for doing so.

I don't understand your point, it's exactly what the parent said? Yes, this forces the startups to actually care about the consequences of what they are doing.