I'm sure they are, but as I understand it, the amount of regulation involved in most of Europe compared to the US is on an entirely different level.
For example, in much of the US, employment is typically at-will. Make a bad hire, or simply change direction so an early hire is no longer a good fit, and you have minimal obligations.
In much of Europe, employment immediately or almost immediately involves things like not being able to fire someone without being able to show they are either genuinely redundant or not just really bad at their job but also not capable of improvement to the point they could be useful.
Obviously there are issues of employee protection and fair employment contracts to consider as well, but it's hardly surprising that given the very different employment relationships either side of the Atlantic, small US businesses thinking about taking on their first employees can be much more liberal in hiring new staff because they have much less commitment.