It matters to me, although probably not to anyone else.

> You augmented the main, core part of the game to make it easier to catch pokemon.

And it improved a flawed game (for me) without harming your experience.

> That sounds like some form of cheating to me.

In that I gained an advantage over what the game provides? Yes. In that I gained an advantage over you or any other player? No. I'm not in competition with anyone. I consider it a fairly solitary game (don't see the point of teams and gyms).

I lean towards agreeing with you, and I'd probably behave like you if I played the game. But one way in which you (in the aggregate, of "cheaters") do hurt others' experience is by artificially diluting the rarity of pokemon. That's a part of the experience for other players, which if you use tools to help yourself, indirectly is harmed. Not you personally, but the fact that such tools exist and people are using them.