It not about the Shower or the jeans. There are many things that are protrayed as Halacha , when they are actually Hashkafa, Chumoros etc.
Alot of things that he is “Breaking Halacha” might even have some Heters (maybe WEAK Heters, but they have them and you can rely on them)
the problem is some kids are told some things are Halacha and when they find out its a chumra or Hashkafa its starts to break the whole system down, The kid finds out the Shower is a Chumra it doesnt take much of a Kal-Vchomer to say maybe Shabbos is a Chumra as well.
One must be careful with Chumras, Ive seen many people here say Chumras are how people show how much they love Hashem, but it says somewhere , What was Adom Harishons sin, It was he made an unnessasry Chumra, Hashem told him not to EAT the Fruit, But he told Chava his Chumra , not to TOUCH the three, Once the Snake threw Chava against the tree and she touched the tree and saw that nothing happend, everything else broke down.
This is not for or against Chumras and Hashkafa, One must be careful about these things, If a Chumra creates a positive then its a good thing, but if it creates a negative feeling, then its a terrible thing. It is a fine line sometimes