You didn't say it per se`, but you did imply that I shouldn't criticize hydroelectricty on account of all the people that died in dam construction... which would imply that you don't think that their is a problem with people dying in unsafe work conditions or that they are otherwise justified by their output which is considered a good thing.
So I can criticize regulation policy, but it's cheap, dishonest and exploitative to point out the fact that mining for coal is dangerous and that danger is directly a result of energy policy? I disagree completely and I'd say that those negatives should be labeled against attacking an effect (unsafe work conditions) while glossing over the situation that causes them.
Your argument against alternative energy dangers is absurd, since it's a hypothetical situation that there is no data to compare. In more realistic terms, those technologies are also dependent on mining, which does carry risk. The fact is that there is no industrial process that carries no danger to workers. However, it seems to me that coal mining is especially dangerous and those deaths could potentially be minimized through alternative fuels.
Also for the record, I didn't advocate an immediate stop to using fossil fuels. In the thread on Obama's new offshore drilling I highlighted some of the problems that make a transition to alternative energy difficult.