I actually like "there is a counter to the gym available nearby" as a design move, at least compared to "there is no available counters to the gym". Diglett Cave and Kalos Route 13 are rather blatant examples of sticking ground-types near an electric gym, but compared to Wattson in RSE, where the only ground types are the Water starter(wut), Nincada(lol), or Geodude(10% encounter on 1 floor of 1 cave), yes, give us an obvious way to find a counter. Or don't, I'd be fine with "there are no counters, train your team better", but that relies on not giving 1/3 of players a win button. And if the gym falls apart due to a counter-type being available, that's more about poor boss design than the encounter locations needing a rework.

