I'm not seeing the contradiction here.

If I buy a tool and damage your property with it, you can sue me, not the tool manufacturer. If I think the tool malfunctioned and led to that damage, I can sue the tool company to try and recoup the damages I had to pay to you. Both parties can be liable for different things.

That may be what the op meant, I’m not sure. But I took it to mean the company offering the service needs to know how to use the tools responsibly. I guess the analogy with a power hammer would be hiring a contractor who destroys something during the course of doing a job you asked for. That contractor can’t blame it on the power hammer. If you offer a service you are responsible for the actions the service takes and you can’t put all of that liability on the user