Every live event has featherweight fights, plus the ease of build and availability of parts means you can easily start by building your own featherweight from scratch rather than buying second hand.

Similarly featherweights go into 2 guarenteed big rumbles every show, and it doesnt matter if you pull out. With heavyweights theres often a que to sign up, and by pulling out you wont be able to get back in again.

Plus featherweights get their own events which heavies dont attend.