What gets you down isn't the injustice of it, if such there be - it isn't fair that some people are better at a given thing than others, but "fair" is something no one ever promised any of us life would be. What gets you down is that you can see how it would be a useful skill to have, but you don't want to invest the effort required to develop it. That's an internal contradiction, and those are uncomfortable to carry around. Either developing the skill, or abandoning the desire to have it, will resolve the contradiction. Just pick one and do it. You'll be fine.

And it's not even as though the skill is all that hard to develop! The first thing to know is that, to a good first approximation and in the general case, nobody in a social setting cares one way or the other about anyone else, so your actual personality doesn't really come into play here. What matters instead is that you be enjoyable to socialize with, and that's not a matter of personality but rather one mainly of wit, good cheer, and the ability to carry your share of a conversation. If you happen to have the kind of personality to which these traits come naturally, great! If you don't, they can be developed through observation, trial, error, and practice.

Worked for me, at any rate, and I've been a strong introvert all my life. Being so, I remain picky about when and how I socialize, because it costs me energy to do so and I don't always enjoy it - but socialization is a necessary aspect of full membership in a social species, and unless you can make a go of ornamental hermitage (good luck!), it's worth developing the skills to make the most of those social occasions in which you do necessarily participate.