From what I can understand so far, I think it is a matter of linguistic preference, depending on the environment one finds oneself in. We all use magic, after all. Though, I would say the mages here use it more combatantly than most of the wizards and witches at home that aren't Aurors or work for the Ministry.

They could. But wands are tougher than they look. My own has been through countless experiences that really ought to have crushed it. [Not to mention the various teeth marks marking it, both his own and those of various creatures of varying size and danger.]

Really? That seems an aspect of immortality most would pay a steep and high price for, from what I know of people.

Well, it does come in handy when one needs to disguise oneself. So it can be quite the useful tool to have.