Yes, emulation is good and an extremely important contribution to the overall gaming culture.
Even if you "don't support emulating new games", you'd have to support the development of contemporary emulators to be consistent with the rest of your post.
And again, I don't think there's a good argument for gamers to be concerned with copyright infringement at all. Everything in your self interest is for strong legal protection on the side of the emulators, encryption crackers, and even distributors of infringing material. On the other side, against your interests as an individual is the corporate copyright holder.