They focus on SMV as if career, looks and status peak in every man's middle age. The problem is, your women who are 21 are not dating 35-40 year olds, they're on average seeking 25-ish old men. When you're at "peak SMV", if you go for young women (men of all ages prefer young women), there will be stigma at such an age gap unless you're rich and don't mind being treated as a sugar daddy in a dead bedroom relationship. That brings me to the next problem.

The manosphere also completely ignores pre-selection and experience. If you've followed their advice and just focused on career, gym and independence until your peak SMV and then enter the dating market, you're now at a disadvantage as pre-selection becomes a far more important factor and your competition has what you have plus relationship experience. It's like going into a job interview lacking work experience, employers are going to pick up on that discrepancy and not offer you the job. In a similar manner, so will women when you demonstrate you lack relationship experience your peers were gaining in their 20s and 30s. And this isn't something you can learn online or at University, you learn it from the school of life and your lack of it can not be faked or lied out of.

The other blindspot is the assumption that all men reach the same peak. Men have different levels of development, limits, ceilings and experience. If you lack these then your peak SMV will be a lot lower. The man who is still a virgin at 35 is not going to have the same SMV as a man who runs a multi-million dollar business and has a string of lovers to his name. The men who are single in their middle age will, unless they meet their unicorn, remain single when they hit retirement. Nature and dating is brutal and only cares about biology, genes and reproduction, not your feelings, emotions or desires.