Yes, but you are compensated for that risk, that’s what a salary or wage is.
Yes, you buy the equipment but you don’t get paid unless the miner is…mining. It is rent seeking behavior to want something for nothing, bitcoin does not allow that.
You are right, if they are not good at the work they do, they may not get paid…workers take the same risk. I would argue the workers have more risk if someone else owns all the means to production. If one person owns the means and they make a stupid mistake, those workers lose their job to no fault of their own. How is that not more risk?
