while obviously not the case for adventurers, for your average commoner or really anyone that doesn't immediately need to get back into battle a level 1 kineticist can pretty much put an entire citys doctors out of business, since burn is the only limit on how much they can heal which can be shifted on to the person being healed, and since its nonlethal the worst case scenario is someone gets knocked out and wakes up in the morning at 100%
sure you cant regrow limbs or cure diseases with the snap of there finger, but being realistic neither can modern medicine, imagine if you could go to the doctor for horrible burns or because your bleeding out and they just slap you a couple times and you go from life threatening injury to good as new in less then a minute, since its so fast and simple even one person would be more fast and efficient then an entire hospital of doctors
and this is not getting into the fact most dedicated doctor kineticists would be Kinetic Chirurgeon and thus could pick up mercys so they could infact regrow limbs and cure diseases with a pat on the back
and with the exception of the mercys this is at level one, if kineticist was a class you could learn rather then just being inherent every single medic in the world would be one, awakening hydrokinetic or telekinetic ability's is like winning the lottery , you got a prestigious and incredibly easy job and are set for life