The point is:
The HCA has bylaws and Fleets have charters. The bylaws have never allowed anything but Hobies at events.
Each fleet can have a commodore and each division has a chairman.
If you want something changed in the association then get it on the agenda to be discussed and voted on at the annual meetings.
Things should not be changed at the whim of any one person or small group.
I haven't met anyone yet that believes their ideas are bad. Everyone thinks their way is the best.

If NAMSA or the NACRA association want to amend their bylaws don't they go through a similar process?

I believe that the HCA should be looking at the F18 issue and also the Wave issues.
I have also discussed allowing fleets to invite other one design classes(ie Sharks ) to attend our regattas as guests.
My head is not in the sand, but there is a process to make changes.
If the issues are brought to the table and the division reps vote them down,then try again next year or work with another group as some have done.