I'm more willing to bend for health and safety, too. After all, we're talking about survival issues, and if no other option is available, then you do what you must. As I've said elsewhere, vegans "seek to avoid" animal products and byproducts. If you have a medical or safety need, and there's no alternative, you've done what you can to seek to avoid, but you flat-out can't. Seems you'd still be vegan to me.
I simply don't accept it when people don't exhaust all options first, or find a way to rationalize something they want, and don't need.