dot ... Are you sure you read the whole thread? Because I don't understand how you could use the phrase "send their child away" if you had. Setting aside the poor, departed OP, surely it's clear from the posts here that that is absolutely not the sort of relationship that contemporary families have with their boarding children.
And while most people do indeed love bringing up their children perhaps they make decisions with which you have so far not been faced?
You heard all about their day while you collected then from school? Car? Or the physical fitness to walk or take public transport? Lucky you. Perhaps you might occasionally have felt differently if you were bed or housebound.
Snacks and sorting out homework? Not one of those mothers who's working till 10pm most days then? The ones who made a different decision for their children because they have utterly failed to be you.
A meal? You're not in a B&B then or stuck with hostile in laws?
A club? Were they all free? If not I hope you pity the mothers whose useless ex partners refuse to pay enough to support such luxuries.
An evening spent visiting friends or family? And you genuinely believe that every single family has this lovely option available to them?
Home for bath and bed? Just as long as the abusive partner isn't smashing the place up. Or an older, bored child isn't raging because they have no outlet for their energy.
Everyone wants your super-lovely life dot - but things don't always work out like that. So other people choose other paths. And some of course have no problems whatsoever but just want their child to have more of whatever a particular school might offer. I'm sure they would do you the courtesy of trying to understand your choices ...