I think Karthik is concerned about how the matches will be.
Although I've seen exceptions, the majority of robots that will be capable of going under the low bar will probably be incapable of doing much else,
as Joe G. has convincingly argued elsewhere.
Therefore, I think Karthik is worried that if the poll is true, the matches will be boring, as most of the robots on the field will be ineffective limbo bots, while the experienced teams will run away with the matches and drive up the scores.
If this is indeed what concerns Karthik, then I think he can relax. The poll is likely accurate as to the amount of teams that
plan to build low bar robots. However, that does not that they actually will. I think the task may just prove too difficult, and many teams will decide to scrap their low bar plans before the end of build season. The rest will either make effective limbo bots or get weeded out in the course of the season.