Now I'd find it moderately interesting for a bit, despite minimal interest in football, but I'd get bored of it pretty soon

I understand this sentiment, but I'm not quite sure about your analogy between football and mating. Football is a sport; mating is a species-typical task. Articles on mating are relevant to a wider audience than articles about football. A better analogy would be between mating and another challenge that almost everyone deals with, such as akrasia.

Not everyone is equally interested in akrasia, but the community seems to find it worth discussing as an example of applying rationality to personal development. Why is mating different?

But spare a thought for those of us that are female or just not that into dating.

I see rationality as relevant for females to improve their dating and relationship success, also.

As for those who are just not that into dating, I think this population may contain heterogenous groups:

1. People who are already in satisfying relationships

2. People who genuinely aren't interested in dating, or in relationships that can be achieved by dating.

3. People who want relationships, but aren't interested in the dating steps necessary to get there.

4. People who want relationships and would want to be dating, but have challenges in those areas, and have suppressed or denied their desires.

For people in groups #1 and #2, I can indeed see how they would quickly become bored by discussions of rationality applied to mating, just as someone who has their akrasia issues handled would become bored by continued discussion of akrasia. Individuals in groups #3 and #4 might benefit from such discussions, even if they found them initially uncomfortable. It may be hard to distinguish people in the last three groups from each other.