Er, pointing out that something is actively excluding some segment of people isn't actually an insult, and it's necessary for the healthy functioning of a game in many cases by making it plain what you're interested in fostering as behavior on your game. There's a sort of proactivity involved in playing on gridless games that is absolutely a desirable trait in players, and choosing to take the steps to foster that behavior and weed out other behavior isn't a bad thing.
In this case, we're talking about a preference for a grid vs a preference for no grid. Choosing to go with no grid excludes the people that have a hard time playing without one. It's not like, a problem? You're certainly not a bad person, there's no judgment involved here. You explicitly stated it's your preference to not have a grid. What I have trouble with is not addressed by your proposed solution. Either I'm not explaining it well, or it's being misunderstood -- I'm not terribly worried about it, but again, my statement of 'that doesn't solve my problem at all' isn't a value judgment.