Listen, I get you - I'm out the other end but it was bloody hard! We had three children in childcare and it cost more than double our mortgage. We paid childcare in varying amounts for 18 years! I used to say I might as well hand my salary over to the childcare provider and the supermarket, because there was sod all left over for me. My parents helped us a bit financially. I could seldom afford to treat myself, but my mum did now and again.
Not only nursery, but my kids were involved in all sorts of activities - swimming, piano lessons, guitar, clarinet, cello, ballet, Scouts/Guides - the cost was eyewatering, but DH and I were willing to go without ourselves to fund it. Our youngest was 5 before we could afford a holiday, and it was via Tesco Clubcard points and not abroad! It wouldn't have been a 'holiday' with 3 small children anyway.
It's hard not to feel resentful when you see peers with free family childcare. We were too far away from my parents (and wouldn't have put that on them anyway), and I wouldn't have trusted ILs for a minute!
My kids are all adults now, 2 graduates, one well-established in her career (which all those activities I endured lol, contributed to), and one undergrad. They're fantastic kids and I am very proud of them. My career parked but what the hell - I have a decent salary and work paid for my masters which I started when my youngest was 10 months old.
I'm heading for 60 now, and am so glad I hung on in there, even when things were hardest. Most of our mortgage is paid off, and we could decide to sell and live on the profits if we chose. I reckon for years I pretty much worked for my pension, but I will reap the benefits of that in the next few years. I don't have to worry about a landlord turfing me out, and hopefully I won't ever need to go into care (neither my parents or ILs did) I will have a tangible asset to leave to my children to give them a leg up.
On the other hand, I have a friend who didn't work for 20 years while rearing her children (high earning DH) - she went back to work a few years ago, but is working in relatively low paid jobs (and fair play to her for upskilling and putting herself out there) and has sod all pension in her own right.
Which brings me to another consideration - keeping your job means keeping some independence. If for some reason you and your DH split up, at least you would stand a better chance of being able to support yourself.