I think it's very simple: if you'd describe its usage as a "skill", it's probably fine. Obvious "navigating this cheat menu UI takes some practice" cases aside.

If a professional team uses data analysis and then teaches their players something like "at 30s, on this map, this player rotates from here to here in 70% of games", that's just good training. If they have this data being live-streamed to their second monitor, it's cheating.