That depends on your area of operations I guess. If you want to go into aviation, medical devices, trains, cars or anything involving big industrial processes, sure.

If you want to build a toaster not so much. You could just slap a CE sign on and probably get away with selling it via online platforms. That however means you guarantee for the compliance.

You also need a manual in the language of the nation where you want to sell it and a model/serial number and a risk analysis. That is not nothing, but the motivated individual could learn all of that in a few years, if they are somewhat intelligent.

Sure depending on what area you are operating in the catch might be even knowing what all those norms are and the fact that we sometimes have to pay to even read the norms is a friggin crime. But it is probably a good thing that there are some requirements one needs to fulfill to e.g. becoming a commercial airplane manufacturer.

Regulatory capture (big corps demanding stricter regulation to root out their smaller competition) is a thing. But not with the toaster industry.

I'm not implying it's regulatory capture in the sense of a conspiracy of Big Toaster. It was more an observation that, generally, increasing complexity in regulation does have down sides in that it gives advantages to scale. Small and even medium sizes businesses are less viable than they were 30 or 50 years ago. Maybe we see the effects of that in the concentration of capital?