I used Assistance on a recent flight to and from Europe.Asthma makes to long walks to gates almost impossible. I can walk shot distances so boarding / de-boarding is OK. Not all disabilities are visible.
Give people a free check bag, let the elderly (65+) board first and install more working walkways and you'd see a dramatic decrease in the assistance requests.
Bring back the golf carts and mark off floor space where they have priority as well. I HATE asking for help but you can't avoid it sometimes with poor airport designs and greedy airlines who want to charge extra for everything.