I guess need is up to those around me, but I shower a minimum of once a day or after a sweaty workout. I like how I smell afterwards and how supple my skin feels.
Bathing is kind of hard on the skin, that might be what the article you posted is talking about, I don't know, but I don't care, either, because bathing at least once a day is an absolute necessity.
Water temperature and relative humidity is what determines that sweaty feeling. If you take a super hot shower you won't feel as sweaty when you get out.
Rarely do I go a day without a shower. There are circumstances when I skip a day and don't feel guilty. On work days I come home filthy.. Once again before work since I want to be fresh for my coworkers. Days off it can be 1 or 2 depending upon my activities.