Maybe the club members should start attending the meetings or simply be prepared to live with what ever the "majority" votes in.
Even after this was passed the attendance at the next meeting was very poor, (only 10 people bothered to show up, which could hardly be called a majority at this meeting either) hence the general membership must not care about this and with the poor turn out it allowed two people to shout down any dissention.
When viewed from afar this really is a unfortunate situation, but at a regularly scheduled meeting a motion was made and the majority in attendance passed it.
I realize you don't like it but apparently the rest of the club does not have much issue with it (regardless of what they might be telling you) because they simply did not show up at the second meeting to do anything about it.
As others have suggested there are several ways around this, but you have to have a significant portion of the membership present (that wants to change it) to get it done.
If you can rally support (called meeting attendance) introduce a new motion that all models weighing less than (pick your number) pounds are exempt from the failsafe rule.
I am not against you on this but the club as a whole is responsible for letting this happen, not just the "4 of 6 majority" that passed it in the first place.