Agree with so much of this!
My wife and I waited to have our 1st child until she was 4 years out of her ortho residency and I was 5 years out of my 2 year GPR. I was 3 years into the practice I am still in as a partner today, and my wife actually switched practices soon after our daughter was born. We were financially stable, however there was till some variability in our lives. Our son came 2 years later.
The amount of overall life enrichment and sense of satisfaction that being a parent has brought us, and watching your own kids grow and discover new things, and become their own person on a day to day, week to week, month to month and year to year thing is far greater that not being a parent was for me and my wife.
I guess in dental practice sense, I liken it to when I complete a big anterior aesthetic case on a patient, Sure, I enjoy the technical aspects of the case and the financial reward that it brings me, however what I really enjoy is seeing the look of happiness and excitement on the patients face the first time I hand them the hand mirror and the get a look at the finished product in their own mouth, I remember that far longer and with a much greater sense of satisfaction getting to see the enjoyment another is experiencing from something that I have done, than anything else.
Parenting is truly a game changing life event, probably bigger than just about any other change that you may have in your life. I will wear you out at times and cause you stress at other times, it will make you cry and cringe at times and question your worthiness as a human being at others. In the end though, the amount of true joy that it brings, far out paces any other thing that I have done in my life, and truly gives me a sense of feeling complete to the point where I rarely think about what I may no longer be doing and/or doing far less than I used to in my pre parenting days.
Whats also interesting as an aside, is my wife and I have a few couples friends who don't have kids (by choice, not by biological reasons) and now that we're all roughly 50 years old, and established in our respective professions for multiple decades, I find more and more that the non parent couples tend to gravitate far more to the kids (or more appropriately the teens in particular) at parties than they used to, and I hear far more regularly comments from them such as "you kids are really fun people" or "it must be cool to go play golf with your son now?" or "it must be fun teaching your daughter to drive" like they realize that there's something that they're missing out on. Parenting isn't for everyone, but it sure is a cool thing in my book!