You sound like the sales rep at the Apple store. I was perplexed.
Meanwhile, I had to wonder how many people take showers that are over half an hour every day.
Many people with long hair and lengthy (body) skincare routines take showers which take half an hour daily. Probably depends on what you include in the shower time.
I'm perplexed how anyone would have trouble charging their smart watch 30-45 minutes per day, unless they have an unusual schedule like (near-constant travel). This is something I almost never think about or have issues with.
I usually wake up place my watch on the charger grab the clothes I'm wearing go brush my teeth take a shower get dress and get ready for the day then grab the watch off the charger and it fully charged everytime.
I don't get the people that need to wear it 24/7 for days at a time.
I leave my apple watch on a charger for at most 15-20 minutes in the morning and that gets it from the 10-20% in the morning to about 80-90% which is enough to go the whole next 24 hours even with a 30 minute lunch walk and 2-3 hours of pickleball fitness tracking as well as having the always on display on.
Never once has this seemed like a problem or that I would want to wear my watch in the shower for some reason. It's shower plus getting dressed and brushing my teeth etc.