I believe in regularly dusting if you want to keep your ends thick. I have shared before that when I didn't dust and decided to join the club of those who don't believe in trimming, my ends got so thin that I had to chop off about 2 inches of hair. I can't stand thin ends and would not hold onto them.
Thin ends may not appear to have split ends but they are thin for a reason. My guess is the split ends have already peeled away leaving a thinner diameter and broken off a little further up the strand. Holding onto those ends just means holding onto ends that are weak and vulnerable and I'm almost certain will break off.
One of the most beautiful heads of hair here IMO is Supergirl's hair. Ends don't taper off into thinness.
For anyone who didn't see my pics, here is a
year's growth from about 1 inch with regular dusting/trimming. Another year later with regular trimming/dusting and again my
hair's still looking great, thick from base to ends. But a few months later of no trimming and my ends were t
hin and ugly and uneven. Had to trim off a chunk to get back to the uniform thickness along the length that I was used to (
top before, bottom after).