Well, look at that. You're narrowing 'stat/value-based interaction' and equate it completely to 'tactics/strategy'. To that, I will reply 'Tactics/strategy =/= stat/value-based interaction', or that 'tactics/strategy isn't the only stat/value-based interaction', at least in RPGs. The most common and easiest example of stat/value-based interactions, would be stat/skill checks. Not just dialogue checks, but just about every kind of checks. From checks found in dialogue (Charisma/Speech), to the ones found in environmental interaction (Perception/Traps).