not good for us to be alone.
I disagree that self-reliance has anything to do with being alone at all. It's about moving towards being able to provide a plethora of things required for life and even enjoyment without waiting for someone else to do it.
The rest of what you say makes perfect sense, the time thing you mention and the slant towards greater self-reliance through a garden that produces food; I think that's becoming more of an issue in a time when so many don't have the skills around doing it or processing the foods that come out of it for future use. (Another thing that is self-reliance focused.)
I'm a prepper so can talk about this all day however this post was more about my financial readiness (and decisions around that) so my partner and I don't need to rely on some immigrant who doesn't speak English working in a nursing home to look after us, so that we can keep rockin' it in the way we do now and enjoy the life we have now even after we exit the workforce. It's a pretty good life so I don't see the point in letting it go for something less.