So once you did your own trusted setup - who is stopping you to create a docker container to your liking and use that onward? I don't trust anything, hence all

So once you did your own trusted setup - who is stopping you to create a docker container to your liking and use that onward? I don't trust anything, hence all my docker containers are created personally and use them moving forward. At first it will seems like it's a never ending job to create another docker, but eventually you'll have all your needs fulfilled. Nowadays it can go a month without needing to create another one since I already did this A+B+C combination in the past.