Weld smoke is pretty nasty shit. But, there are plenty of specifications for building ventilation which keep you from having to breathe it all the time.
Yes. My school has a recently installed ventuallation process that starts sucking out the fumes near where you are welding (less than a foot) and takes them out so you do not have the gas get into your lungs. You still have the problem of eye and skin safety, but those are things you yourself can prevent if smart enough.
The areas you work in can still be very unsafe. High danger of vile fumes, high up places... underwater welding is daring death. The avg life span of a deep water welder is 2-4 yrs max. You can make 200$+/hr doing so, but it is dangerous work. The pressure is more likely to kill you than anything else from being so deep and then depressurizing. But hey, if your up for playing with danger for big money sure. Im gonna stick with the easy stuff for now.
then she'd have to learn diving too. they probably prefer dudes for that, unless woman is xbox hueg muscles.
Diving be cool to learn.. But not for welding purposes. Inducing myself in constant electrical shock and other hazards not fun.
And my eyesight is already not that great, wear glasses xD Haha. But hey, if I get that kind of money to weld, laser eye surgery would be possible. For now its fine.