Online, some men tend to dismiss older women like diodes, believing that women are only good when they are young.

Brother Yin thinks that being young is good, and being older is also good; each has its own characteristics. Of course, overall, the proportion of younger women being better is higher.
Whether it's good or not, it's not just measured by age alone. An older woman who is beautiful, elegant, and content is especially wonderful.
If both young and old women lack inner qualities and the comparison is purely based on appearance and sexual attraction, of course, the young are better. If you value deep communication and interaction, slightly older women are better.