Wecome to the Forum (new) gentlemen. This Safety Director may have reasons for dictating 'no steel toecaps', but they're not logical from a crush load or electrocution viewpoint. I see no reason to put yourself at risk in ANY matter, even if you are 'only' the apprentice- you're on the team, and that's that. tkb's suggestion of a non-metallic reinforced boot neatly gets you off the hook, short-term, but as growler says - see what the other older guys are wearing. Bear in mind too that safety boots can also protect the soles of your feet from sharp objects- your are 100 times more likely to put a foot on a nail at work, than have an Abrams tank drop on your foot. Good luck in your chosen career, by the way.
Wood work but can't!