I tend to listen to advice from those with resumes proving success in a field.
My wife and I celebrate 49 years of marriage this month.
Since we were teenagers, and "experts" assured us it wouldn't work.
If you can top that, I will take your marriage advice.
Congrats. Impressive.
Some women are firmly in favor of their male gynecologists and some accept only females.
I had an elderly missionary friend in Taiwan. She'd had 10 children. I asked her how she felt about single folks who never had children giving her input given her vast experience compared to theirs. She said she welcomed it as they had a perspective, a vantage point she didn't have and she often learned useful things from their perspective.
Then there's the issue of learning from one's mistakes. Often, folks who have finally learned to do it right from making lots of wrong mistakes and overcoming them--have more to offer a couple starting out, than a couple who didn't have that many problems for 50 years. I worked hard to be a good husband and still somehow failed. My wife after 9 years married her co-worker.
Nevertheless, many marriages have benefited in lasting ways from my psychologist inputs over 40 years.
So, while I agree, to a point, that there's some sense to your assertion . . . it may not be as cut and dried absolute as you seem to make it sound.
I think the major issues in marriage are
--1. Avoiding selfishness like the plague
--2. Putting your spouse generally first with compassion and genuine love--a choice vs a feeling
--3. Submitting one to another in humility
--4. Seeking your spouse's best interest first
--5. Sacrificially servant-heartedly loving your spouse in all the ways you can prayerfully imagine to do.
--6. Taking care of yourself in ways that leave you being someone to look up to, admire, appreciate, learn from, enjoy, have fun with.
--7. Putting God first in your relationship and following His leading in how to love your spouse.