Because you want to give back to FT and you are willing to work your way up from an entry-level helper position. Plenty of CEOs began by working in the stockroom. IMHO this path will have a much higher probability of success than starting off in a contentious forum.
Probability of success? I don't get it. Entry-level helper position? I find that condescending.
Contentious forums would need ambassadors, too.
Frankly, I don't see this role as something on the pathway to something greater and more glorious. It's not a moderator-in-training or in-waiting role. If that's the thoughts of others, though, I think the entire proposal is lousy.