We don't call them "common people," your taking it out of context.
And dumb to the name? It's called hierarchy to match the theme of the crew. TITANS of smash, CLASH of the TITANS, etc.
The reason we can't let everyone completely have a say for who goes in crew battles is because of bias, which we have had a lot of problems with in the past (We've especially had this probably recently in the past 6 months or so). We had no way of choosing a final roster for battles that could please everyone 100%, so the only solution was to find a roster that pleased certain people - the hierarchy - the people who were the least biased and knowledgeable of the crew that had the ability to make the best decisions for the crew.
While I personally always ask for input from everyone, you can't have every member have a completely equal say or they get their way in contrast to what's best for the crew. This is also needed beyond crew rosters for new members, or maybe some things like that.
Also, if everyone had equal say, then new members could come in and shape the crew to how they please apart from all of the original members. Example: Pretty much at the same time back about a year and a half ago we recruited Toushi, Shakugan, TenNoTensai, and (I forget his name lol). Four members were a lot considering we didn't have many of the members we did today, and when we were letting everyone have a say in what was going on, they were in opposition of what the rest wanted, and it started to make a split in the crew, and it was near impossible to find a way for everyone agreed. We were scared that the original intentions of the crew would be changed which we did not want to happen, which was one of the original reasons for the hierarchy, which also had a rule that in order to be in it you had to be an original member, though that rule was eventually removed due to the extreme amount of new members and lack of activity in many original members.