But -- this is a club, and we should be talking about the larger membership population, not just the IT population. And this proposal here, I would guess, is not being proposed to fix some damage to IT, as your question surmises. It's likely being proposed to address a larger issue with the membership.
If National racing is ill because the rules for National Categories has made the program ill, the solution is fixing
those rules. If I've torn cartilage in a joint, NSAIDs will make me feel better and mask the pain, but it does nothing about the torn cartilage and actually does harm since I'm ripping the joint more. Pain is the body's way of saying "Don't do that, it hurts." Low participation in a Category is the membership's way of saying "Don't do that, it hurts."
If there is some larger issue with the membership that needs addressing, then let the Authorities state that problem.
So the right question is not "what is currently damaging IT", but rather, "Would adding national eligibility for IT be better for all of our current and future members than the current situation?"
Define the current situation. What is the problem? So far its been framed in two ways - the desire for a gold medal and pulling the arse of National racing out of the fire into which they voluntarily jumped.
Naturally any change is bad for someone and good for someone. You have highlighted a few reasons why such a change might be bad for some of the current IT-oriented members. But is there a chance that it's a net benefit for the club membership at large?
Again, I say... define the problem/disease/issue. Those desiring an official gold medal are a very small subset of the membership and those that are both interested in winning and financially capable of persuing a Runoffs (tm) berth are very much in the minority.
I think the answer is yes (and the reasons why are already in this thread), but I think the reason there are so many arguments here is that we're not all trying to answer the same question.
I think the answer cannot conceivably be yes since the question hasn't even been defined. What we have hear is a solution in search of a problem to solve. Move IT to National because <insert problem here>. This smacks of verdict first, trial second.
What is the problem that is trying to be solved?
What are the causes/sources of that problem?
Answer those questions and then the issue of whether moving IT to National status might be relevant, but from where I'm sitting, it seems that some people think that this move will solve every crisis in the club, turn water into wine and prevent me from constantly flat spotting my tires. And while I'm in favor of something that will do the later, I really doubt the ability of this proposal to do that.