A Discrepancy in Language

I know this could be a vast topic including a huge list of words. But at this point I really question only one.

PASTOR

This word in the bible refers to "shepherds" of the church, overseers, or elders. Today in most churches the word is used, more or less, to describe someone who speaks on Sunday mornings. I question some of the differences here and if they really are something that truly matter, something that we ought to make a big deal about and say things like, "Well, we really should call them ministers." Or something like that.

There are a few things I'd like to point out.

• As far as I know the "denomination" Church of Christ is the only "denomination" that chooses to call it's speakers/teachers/preachers ministers.
• I know that Baptists, most non-denominational (or community) churches, and some others call them pastors.
• Then you have Catholics, Episcopals, Anglicans, and such who call them Priests (which is arguably a completely different role than teacher/speaker).

A suggestion of why these "denominations" who call their speaker/teachers pastors is justified is that they more specifically will call them "leading pastors" or "teaching pastors." By that, they mean that they are one of the many pastors at the church and they have been assigned (by the other pastors) the role of leading and/or teaching the congregation.

Anyhow, once again -- I wonder if this language discrepancy is really worth fussing about at all. What do y'all think?