"No dig" in Pots

Compost just isn't a very good growing medium for the longer term. In containers it seems to gradually lose its structure whatever you do. Perlite, bark, grit etc. all help aeration but eventually the organic matter in the rest of the mixture decomposes into dust. This leads to compaction and lower ability to hold water and air, which is bad news for roots. As has been said, in a container you don't have the insects or microbiome as you would in soil. Compost applied to the top of the container is just going to sit there and gradually break down with no structural effect on what's underneath.