Hello there!

[puggsoy]

If something "matters" is relative to the context though. If you were to hire somebody for a job, age would certainly matter. And if you want to know what to recommend as the ideal diet to someone, both age and sex would have to be taken into consideration, and would thus matter.
But obviously I get your point: on the whole, what you think of somebody shouldn't rely on their age or sex. Correct.

And yeah, we have gotten off-topic haven't we. Sorry