Furthermore, all of the conditions listed are subject to Fed OSHA as well as state safety codes.
When working on energized circuits, for example, there are Personal Protective Equipment requirements - gloves, shield, flame retardant clothes, etc. Basically, energized circuits are avoided and shocks prevented by LOTO (Lock-Out, Tag-Out) procedures.
Noise is similarly regulated and hearing protection is required when the exposure level hits a certain limit.
It may well be that those conditions are present and safe practices already in place to mitigate the risk. That would be my take. Yes, these things are here but, no, they're not going to hurt you because we're going to train you.