Dimner,
You are more right than wrong. None of the people I know who ML would have one if they could hunt during ML season with a modern rifle. None use a ML during rifle season. Same with bows. None of the people I know would want to hunt with a bow if a rifle could be used.
This is in the ML forum and you are getting a subset of hunters. Factor in that these guys want to have a season of their own to justify the investments they have and make them "special". They like the fact there are fewer hunters out there to deal with and are not interested in growing the number of participants.
States have different priorities. Harvesting is down, number of tags is down, herds are up. They face deer management issues as well economic issues. Most ML'ers will resist any changes that affect their interests and some are concerned about the "purity" of the sport.
All hunters are not ML'ers so the states have little choice if they want to address their concerns.
In some states, we have the new straight wall cartridge rules to allow rifles where only shotguns were legal. They did that for a reason.
In MI, there was (is?) a bill to start rifle season 10 days earlier. Some support it, the traditionalists do not.
ML'ers will not be immune to changes either. Follow the money.