Stripeybear, I almost wept reading your OP. I would give anything right now to be in your privileged position. I am a single mum working flat out, self-employed, DCs solely reliant on my income. Recently collapsed at home with pneumonia and full blown 'flu. Only able to take off 4 days sick, despite barely being able to get out of bed. Still needed to do school runs and shop for DCs and now back full on working. though still very ill.
I would LOVE to be in your position. The house is filthy and a complete tip. I have an enormous backlog of work undone for the business. Had already cared for DC1 through his own virus the week before my own, with him off school AND me trying to work, between looking after him.
Our lives, OP, are poles apart. You talked about, 'booking my holiday at the last minute', when you were working. Some of us have never been able to take a holiday at all! You talked about 'pottering round' nowadays and this really did make me weep. I would LOVE to be pottering round right now. I still feel incredibly ill - fortunately only been this sick about 3 times since I had my DCs.
If the DCs get some food today, that's my main aim. It won't be home-cooked. It won't be a lemon drizzle cake. It may well be pizza. I've never ever had time to cook from scratch or make a cake since DCs were born and have always done everything absolutely alone.
I seem to be surrounded by women exactly like you. They not only have OHs but also family, mums, other people they call on in times of need. I don't have time to cultivate friendships with them or have them round for coffee. I'm always always working. Parents are dead. Illness has tipped things into a whole different category of 'challenging', so I do admit I'm reading you post at a particularly hard time but it really got to me!
I think perhaps you can't have any conception at all of the life of a single parent who has no back-up support or alternative source of income. I would however, echo what others have said or implied about the danger of what would happen, in your set up, should your OH leave you and you get no maintenance and then have to fend for yourself. That seem to me to be the vulnerability in your 'system'.
My strength is that I'm wholly self-sufficient and rely on no one to 'bring home the bacon'. I won't be baking cakes or having coffee mornings but I will never be left high and dry with no career or earning power oneday, should my OH dump me. (I don't mean to imply that your OH would ever dump you but I do know that it can happen).
My vulnerability is that we're all reliant on me alone and so I can't be ill. I can't take time off to potter around or book a holiday. So when I AM ill, everything falls into chaos....hence my emotional response to your post and my 'envy' - but just for today I hope - of your privileged life.