Philosopher here. You can take many approaches to this, depending on your viewpoints:

1. Objects have meanings in and of themselves. In this regard, a "Pally" is not a "Paladin," because "Pally" refers to a specific thing, that being the entity of a paladin from WoW and not a paladin in FFXIV.

2. The mental image of a "damage dealer" and "dps" are different, so to attach the word "dps" to someone who deals damage is wrong, as it doesn't match up to the mental image.

3. The communal understanding of the words do not include the instances to which you're adverse.

4. The agreed upon terms do not include the instances of the words to which you're adverse.

5. Words are meaningless and you arbitrarily take offense to specific instances because you're absurd, just like the rest of us.

I need to go to bed.