Yes, this. When I was growing up my parents never explained good hygiene to me. They practiced it themselves but for some reason it never occurred to them to tell me to shower daily, wash my face or use deodorant. That was fine in grade school but once I hit puberty and everything got greasy I was probably pretty gross. It took several months of pretty severe bullying to get me to pull my hygiene up to snuff, and even then I had to ask my mom to buy face wash and deodorant for me to use. And my parents were pretty good overall. Jill had cheap, communal products, shitty parents, and a household ethos that seemed to be “Just cover the blemishes up with makeup“ rather than “take care of your skin so the blemishes don’t develop in the first place.”
As to the broader point about common sense, I think sometimes we forget that Jill is literally just now learning how to be an adult. It’s been a steep learning curve. I choose to applaud her for the progress she has made (making new friends, going to new places, putting the boys in public school, using birth control) rather than focus on the backwards steps that have come along the way. I really think she is trying to be a good friend, mom, wife, and person. Even her religious posts don’t bother me. She’s not preaching hellfire and brimstone or being pushy, just sharing part of her life that is important to her. I get the sense that out of all the married girls Jill has the most compassion and love for others. Jinger and Jessa preach about it but I think Jill really feels it.