I would agree with the OP, except I'm conflicted as I would like to get married at some point in my life.
I earn more than twice what my current DP earns, and am a very high earner.
I am planning leaving DP in the next few weeks, primarily because we have been in an engagement that has now lasted over 5 years, and he consistently makes excuses about setting a date (I know he doesn't want to marry me), but also because over the last 2 years, he has turned into a complete man-child.
I have a senior level job in finance that I didn't give up when DC were born, and was promoted coming back from first maternity leave. Each pregnancy I was off 7 months, and my parents looked after DC until I felt they were old enough to join nursery (12 months old). I also do all of the life and house admin and DC related anything, except when I can beg him to "help" me on the odd occasion. We have a cleaner, gardener and my parents who support me with logistics, and I would give up DP before I gave up any of those people.
When I leave DP, it will benefit me hugely, as when the house is sold, and we each take our share of equity, I'll be able to buy a larger house in a much nicer area for me and the DC. I won't have to share any of my 3 pensions with him (started the first at 23, I'm now 40), and contributions have always been at least 10% salary.
He won't have access to my savings, and he won't be able to buy a house similar to our current one, as he doesn't earn enough to get a bigger mortgage.
I would like to get married at some point in life, purely because I would love to be with someone who loved me as much as I loved them, and wanted to make the commitment of marriage.
However, in the financial position I am now, I wouldn't want any future DH to inherit before my DC. If it's possible for me to put my new house and pensions in trust for my DC, that would certainly mean I'd be more comfortable marrying a new man.
I'm in a very unusual situation, being the female higher earner who hasn't suffered from taking maternity leaves, and given that if current DP was after my money, he would have just married me! He's been married before, and was badly burnt through that experience, though until very recently had still been claiming he wanted to marry me. Ho hum.