I doubt that many doctors in Italy would agree with you.
The key words are “so far.”
The problem with your line of thought is that by the time you have enough information to change your mind, it will be too late to do the things that must be done very soon.
Strong mitigation practices should be put in place NOW.
what are you proposing ? we are a free society not China and there is little that can be done to prevent the spread at this point - not even padlocking people into entire buildings would likely help.