You don’t understand why people would bring their own products when visiting someone?
Firstly I would think that if I was visiting someone who uses soap to wash their face that they would not have any suitable face wash for me.
Secondly, skin care, decent skincare is expensive, I would never presume that I could just use anyone else’s products just because I’m visiting them.
Thirdly, skincare and toiletries are personal. I too have peri skin atm I use a variety of cleansers, morning, night, exfoliating, breakout, calming.. depending on what my hormones are doing. Then I treat and moisturise with day time or nighttime products accordingly. Even pre peri I’d only use brands that I could use on my skin, not everyone’s skin is the same. I have preteen and teen DDs, they to have specific products based on their skin type. If they ever dreamed of helping themselves to anyone else’s stuff without permission they would be in a lot of trouble.
The same goes for toothpaste, there are five people in our house and we all have our preferred toothpaste, the only time we put up with a lack of choice is when we go on holiday and then it will be one adult and one child option. Which we bring ourselves.
shampoo ditto, I have spent years finding the right shampoo for me, it’s not a cheap one either, dd1 has fine greasy hair like mine, dd2 dry frizzy dd3 a skin condition so can only use her medicated stuff and a balding DH who doesn’t need any..
Guests have a huge variety of products I’d happily share in my house but I’d never presume I could just help myself in someone else’s home, that’s just rude.