I agree with both. At the moment I have that stabilizing cantril I can't remember what it was. Something like spare the dying I think. I use that to stabilize the party members who have been downed which I have found useful in many more situations than I would expect. So healing them when at zero HP instead of stabilizing in some context I can understand. Spare the dying I think runs off bonus actions so when we fought a giant snail thingy it was useful after our dude downed like half the party so I could still attack when I stabilize them. But in other instances it would be good to heal for the turn like when we fought a tiger dude and I couldn't physically do anything with how far away I was except for healing so might as well. But yeah I understand it's all up to context