I also think it depends on how many kids you have and if you have other people sharing the responsibilities.
I got myself 5 kids within 4.5 years and no, I do NOT have 45 minutes a day for myself, I hardly ever have 10 minutes. I am juggling work and kids and household and volunteering work (and I love all of it). I go to bed after midnight and get between 6 and 6.30 while I still wake up to breastfeed the youngest one one or twice a night.
But, most people do not have such a crazy family or arrangament. Normal people get a baby, and then perhaps another one. Not twins and then another set of twins for the fun of it

If your husband helps or you have grandparents, you can still attain a reasonable lifestyle that does include things like free time and personal space, although in much lesser amounts than you had been used to.
Just my two cents
