I agree that a guy would be more likely to stay, though I think the reason is largely a mixture of blue-pill conditioning and a scarcity mentality. The question still remains, what does 'idealistically' mean here?
First off, awesome suggestion. Rollo is among my favorite authors of all time. I've read all his books and his blog, and know this relates to Iron Rule #6 as well as his articles Men in Love (2012) and Women in Love (2011). However this remains one (of a VERY small list of things) that I'm not sure I agree with Rollo on.
I'd argue that the comparison effect is not gender specific. Most guys would date a 5 if she was the hottest girl on the planet, or turn down a 9 while swimming in a pool of 10s.
About the example of a male plumber with a female cardiologist, or a pool boy with a female millionaire, etc, I think it's just an example of the female dual-mating strategy. The plumber obviously isn't triggering her Beta Bucks attraction, but can trigger her Alpha Fvcks side. No paradoxes here. He's a likely choice for infidelity when she's ovulating. She'll still like to date Jeff Bezos, but will find herself having sex with him more at times when she's not fertile.
Robert Trivers puts forth the theory that since males don't need to invest as much in having a child, they evolved to be less discerning in who they will mate with (see The Selfish Gene or The Red Queen).
I agree with what you've written. And if this is what Rollo means, then dropping the terms 'idealistic' and 'opportunistic' would make it less confusing. Because it seems to be saying "both men and women are based on what they get from the other person, but each gender has entirely different qualities/opportunities they seek from the other person".
The part that boggles me is that I'm a guy and I wouldn't say that I love idealistically. Whenever I felt what I think people mean by "idealistic love", it seems to have actually stemmed from (1) blue-pill conditioning, and (2) scarcity mentality. Maybe I'm just abnormal, but if not, then it makes sense to continue ironing out what 'idealistic love' and 'opportunistic love' even mean.