You are conflating childless with childfree.
You shouldn’t.
My wife’s stepmother is in her mid-60’s and is a gorgeous and sweet woman who never had biological children, she couldn’t physically. But she accepted her step children as her own and they her.
She is highly successful having worked 30 yrs as a college instructor and president and now is retired and operates a funeral home and dentist office that are making money and successful. Still with all this going on she makes time for her children and especially her grandchildren. She treats me like a king and treated her late husband the same way.
You can have the career and still be happy, but you have to set your priorities, hers are God, family, then career.