Yes, split ends happen no matter what. Waiting to cut them only when you see them is too late. Dusting ALL strands regularly is how to retain length. I don't even protective style, seal or moisturize my fine strands. The only way I am able to retain is to dust before splits have become visible. That way I can afford to take off a tiny bit and still succeed in leaving fine strands.
coolsista-paris, maybe waiting 10-12 weeks to dust is waiting too long. I dust every 8 weeks and so only cut 1/4 inch. When I waited 16 weeks, 2 whole inches of my hair ends were thinned out from damage. I cut the entire thinned out end. If I had only dusted, the remaining 1.75 inches would have broken off anyway. If you see ONE split end, do you think it is realistic to think that is all you have damaged? Splits start off so tiny and fall away like dust. Those that hang on for you to see a fork have been around for weeks growing to that size. Why even give them a chance to get that big? Wouldn't stronger strands have a better fighting chance?
If I were you, I would get a good trim then dust sooner than you have been doing. Holding onto ends that are damaged will get you nowhere. Ask
virtuenow, she had to sacrifice length for health and is now back to where she was. Healthy hair will gain length. Damaged hair, if not cut deliberately by you, will rip off on its own and leave more ruggedy ends. Why else do you think that those who never used to dust early saw progress when they started to do it sooner? There are some fine-haired unicorns that don't dust and have long hair, but usually, it's the coarse hairs that can get away with that. Fine hair splits so easily so prevention of the splits getting so big that breakage is apparent is a good idea.