I think most of us do most of the things you say you do, I know I did. But maybe most of us don't do it to quite the same all encompassing extent.
Some people are very happy and fulfilled being totally wrapped up in 'career-parenting' 24/7, others love it in smaller bursts but do feel the need for some adult conversation/outside stimulation as well and find it quite a chore to 'play' intensively with their DC. If you are perfectly content with your lot then that's fine. Some people feel that if they don't hand the day to day chore of all that stuff over to someone else and go back to a workplace surrounded by adults that they will go stark staring mad within the year. It doesn't mean they don't love their children every bit as much as you do, just that they aren't cut out for that lifestyle.
I was a SAHM until all my children left school. It was what I wanted, for me and for them and it's what I believe was best for our family. But I am always totally bewildered by those women who have maybe 5 or six children who are all home educated and they seem relentlessly cheerful and enthusiastic about the whole thing, which would have driven me to lock myself in the bathroom with a bottle of gin and weep by about ooh...week 3.
That doesn't mean I didn't enjoy baking/crafting/reading with/educating my DCs about things, just not every moment of our day. We did a fair bit of being slumped in front of a Disney DVD while Mummy zoned out for a bit sometimes with wine as well.
While I dislike that category of mother who continues to put herself first treats her children as an annoying inconvenience that disrupts her social life, or the one who refuses to ever do playdates or messy play because it disrupts her nice ordered routine, I do think there needs to be a healthy middle ground.
I have known some mums like you describe yourself and I'll be honest, they've often had children who have been quite self absorbed, needy and inflexible when around their peers and other adults.
If they have never experienced not being the centre of someone else's world, or shown any (perfectly healthy) benign neglect from time to time,
or learnt to share your time with you - eg 'it's mummy's turn to listen to her music/TV now, or it's mummy's turn to have a long conversation with her friend and you will be patient and not interrupt unless someone is bleeding to death'
or been allowed to have periods of boredom or lack of adult stimulation in order to learn to entertain themselves or to solve their own problems from time to time,
or to appreciate that even their mothers who love them beyond all else, sometimes need some time and space away from them
then they can find the big wide world a bit of a struggle when they realise that not everyone is geared to spending their lives entertaining them or listening to them.