Nobody was commenting on your decision to HE, Critter- just on writing about it as if it was everybody's experience ('messes you up' rather than 'messed my daughter up').
In my dd's particular and rather special case being HE would mean spending far too much time at home, or at least in my company, as she cannot travel very far and cannot get around outside the house without help. School is an ideal environment for her- it gives her a chance of independence without tiring her out physically. I know a few people with her condition who are home educated or flexi-educated, but these children really are isolated, and many of them admit that they find it difficult to cope with other people outside the family.
But I am not going to write a post stating that HE is too physically demanding for everybody. Just for my dd. Each of us has a specific situation to deal with.
However, I do feel that for both my dc's school has been what I think school should be about:
a stimulating learning environment
a chance to be taught by people who know things we don't- more learning is always good
a chance to socialise with children outside the immediate family circle (including some I might not approve of )
an opportunity to meet different adults with different viewpoints
a chance to move outside their comfort zones and experience things that the family does not do (including most modern culture)
a shared experience with their contemporaries- even the negative experiences can have a great bonding effect
Also, it has been one way of getting involved in the local community- we have a strong supportive neighbourhood and the school is very much part of that: it's at the school gates that you hear if somebody's Mum is ill and might need a meal taken round etc. I want my dc's to experience this sort of thing.