Shaving is more than grooming. It's therapy!
>healthier and less irritable skin
Beard is scratching the skin and friction causes irritation (have you seen beard cuticles? They're like razor blades). Also, by shaving you exfoliate removing dead skin that could cause infections by turning into bacteria.
>WRINKLES
How are wrinkles developed? By too much movement! When you have a beard, not only you scratch or itch or grimace, but you also have to lift excess weight with every smile you do. Face skin is extremely, it's not like our shoulders or hips which are able to carry clothes and bags. Keep things away from your face
>skin needs to breathe
It's common knowledge. "Polyester bad, cotton good". The more your skin breather, the better for your health. Not allowing your face to see sun and get some wind is like wearing shoes all day. Don't treat your face like your scalp! Completely different things.

This is not about
"don't do that, you'll look like an incel"
or
"your face is undefined and has no edges"
or
"you try too hard and it's visible "
It's about actually taking care of yourself. For the same reason you take showers, avoid excess sunlight, avoid smoking and work out, you should always take care of your face. It's all people look at, really.