Daily habits are great. For getting momentum, for eliminating decisions,
But they don't cause free or automatic improvement. If the goal is output, then a regular daily habit is good. If the goal is skill development, it can be better to target something specific.
If you are just doing the exact same thing every day it can be easy to plateau, stagnate, or get bored. I still like the idea of output every day because it prevents overpolish; getting stuck refinining silly little details. Deliberate practice often has no meaningful output - a 30 minute recording of practising scales is not particularly interesting.
Should every day mean every day? What about weekends? Holidays? Time off? Getting ill? Getting obsessive about not missing a day can mean you miss out on life.