They make a good point - by showering daily, we are not letting our immune system build itself up.
Having a bit of dirt on you isnt going to do much. Poor hygiene can lead to many other diseases too, plus you smell really bad. You don't need to shower every day but every few days is advisable.
i dont agree with you a modern human being has to take a shower everyday because a person must be smell well and look neat rather than looking dirty and smelling bad..