You're trying to conflate people using the dot mod with cheating by getting an unfair advantage. As others have tried to explain, the point of the dot mod is to provide those with larger resolution monitors the same level of situational awareness that those with 1080p or smaller monitors have. Is it possible that people could've used a similar approach to get that unfair advantage? Yes, but again, that's not what was being done here.
As I'm sure you're aware, DCS is an old game and much of its design and code base has been carried over from its predecessors. Back when the dot method was first implemented, I'm sure it made perfect sense to use a single pixel dot; even 1080p monitors were either a rarity or didn't even exist yet. As monitor resolutions have increased, a new method has been needed for some time, and I'm at least encouraged that ED is evaluating the mod as a potential solution.