I completely agree with this.
I am now an older parent, my dc are in their 20s so I speak with a bit of hindsight now.
Yes our lives change when dc come along. That is a fact and to be expected. But our entire lives do not need to revolve around the dc 100% of the time. We still need to continue keeping a part of 'us' alive in there.
I see it a lot in how badly now at my age, parents (and I will say it is more mothers in my experience) get hit with such a whammy with empty nest syndrome. And why, because our entire lives were 100% focused on what our dc wanted, needed, achieved etc. etc. We went to the back of the queue with our wants and needs.
I am not saying to be not be there for the child's achievements, but in there somewhere there does need to be a step back from time to time to keep yourself sort of towards the top of the needs/wants list. I am not talking about extravagance, just basic things that you do for you.
As in 16 years time, if you don't nurture those things, you will forget about them, rate them as unimportant, and find yourself putting everyone else ahead of you at every moment.
I know of many empty nesters who are really struggling now. I was one of them. I lived only for my children and what they needed and wanted. And when they left home to live their own lives, I felt I had no purpose in life anymore.
It all about a bit of balance.