Child as in singular? This is the L. Don't do the feminine thing and try and push others to make your mistakes so you can feel better about yours.
I never once said "he" should have his kids in his early 20s. Men and Women are not the same.
You and I are in a very similar situation, I wasn't ready to have kids in my 20s either. Late 20s to early 30s is optimum for men to becomes Husbands and Fathers. It's when we're best prepared to lead, protect, and provide.
We have 3 now. We did what our generation was taught was "best". We got married in our early 30s. I, honest to God, wouldn't change anything. However, the fact is that if my Wife was 10 years younger than me, we'd be working towards 5 kids. Is there a scenario where you and your Wife had more kids?
After Vet school she is going to have a very short window to have kids and a smaller pool of men to choice from. There's no changing that math.
It worked out for your Wife and you, I'm glad it did. However, we are statistically trending towards a very near future where 50%+ women over 35 will have never been married and have never had kids. A society cannot last for long with this dire of a stat.
Semper Fi Brother. Had I stayed in I could have retired last year.