One of my favorite games: 'wack-a-mole' and look what popped up again!
A J/30 spinnaker pole should last a lifetime. Ours is 25+ years old and serviceable. Many are replaced after being accidentally lost overboard. You can save a few pounds using carbon and composite ends. A lighter pole may be easier to handle. Some class members can justify the higher cost. The rest decided they were at no disadvantage and came to a consensus to change the rules. There are similar stories for the solid vang and windward sheeting traveler. That's how classes work.
Every J/30 came with a stove or an oven. Ours likewise is 25+ years old and works just fine. Apparently some rust to dust and you can't buy a new one that fits. Somebody shows up at the NA's without one and the measurer has to decide what to do. Let everyone tear out a cruising amenity or find some accommodation. It has little to do with the 12 lbs. Classes have rules that members anticipate will be enforced fairly.
Sailcloth restrictions have been debated as early as J/30 Journal #2 in April 1981. It took four years for Class Rules to allow Mylar in the genoa and twenty-four to allow Kevlar laminates. Eighteen years to change to an unrestricted laminated jib. I recall mainsail material was a controversial topic at the 1987 NA's at Newport. It may be that one day most will determine that the benefit exceeds the cost. It will take a champion of the cause, as we seem to have here, plus facts, logic, maybe even an emotional appeal. It will be also take a consensus majority of class members.
If you wish to sail in a class you accept the compromises, as well as the slow, maybe even capricious way their one-design rules evolve.