It's really annoying when a) someone flatly tells you are wrong about your own lived reality and b( doesn't read your post properly.
To address b, it's discretionary in the sense that my DC don't have to play sport or have any hobbies, can say no to all school extra-curricular activity and eat basic food that keeps them alive with nothing extra.
But that's not either a great way to live or fair. Obviously people make their own choices but like many I'm trying to give them what they need, without spoiling them (there's a lot that they can't have).
Take food. I spend about €250 (£220 Sterling) a week on groceries. When they were 5, 3 & 1 I spent about €100 (£88 Sterling). That's an increase of c€650 month on food alone.
I have just spent just under €2000 sending my second child into his first year in secondary (an ordinary secondary school, not fee paying). I spent maybe €200 for any one child, tops, when they were at primary school.
Regarding childcare, yes, it was at its most expensive, huge at about €2000 per month But if you start to break down all the costs I have now, it is easily surpassed especially as that cost wasn't an ongoing one ie, it peaked & then reduced as they went to school. Once they were all in school I paid €800 ish a month, maybe a bit more or less. Yes they cost me more than that now!