From a strictly medical perspective, it is not necessary for most people to shower daily.

How often should you shower? Seasons, ages, and more
https://www.medicalnewstoday.com/articles/324682 #ShowerFrequency #MedicalNewstoday

How often should you shower? Seasons, ages, and more

The ideal frequency of showering depends on the season and a person’s age and lifestyle. Showering too frequently may affect a person's skin. Learn more here.