Does it matter? Fuck people act like these issues are so important, if people can get married or if women earn enough money, who fucking cares, don't be an asshole, and call someone out on being an asshole when you see it. I would hope people would do the same for me. Seriously who give a fuck if people can get married.
It is more the people getting killed for being what they are that shits me, the people starving while others eat themselves to death, while we fuck each other to the point when the planet can't support us. Stop making such a big deal about issues that ultimately don't fucking matter, and focus on the ones that if left run rampant will stop all the namby pamby hippy shit from being an issue again. Because you know a vast majority of us will be dead.
I see what you're saying, and I don't deny that in the grand scheme of things, same-sex marriage seems like it might want to take a backseat to say: i) solving world hunger, ii) achieving world peace and iii) building a sustainable future that doesn't take our planet into total catastrophe. You could go further to say that in the grand stage of the cosmos, the sum total of humanity's greatest achievements and failures amounts to nary a dot in the time-scale of the cosmos. Having a humbling perspective like that gives pause for us to appreciate the enormity of the universe we exist in, but it should never prevent us from thinking about ways to learn about things bigger than us.
However, to answer your question of: Does it matter? Yes, it does matter
. Right now, we're not at the point where same-sex marriage is viewed as being a non-issue. There are schisms, deep cultural and religious ones where people view it as an attack on their faith and persons. This is a very primitive and irrational retaliatory response to something a great many people view as decent common sense, given the supposed state of modern technological advancement and progressive thinking.
The points about our world and all the troubles that come with our human presence are tremendous challenges. These are challenges that can only be solved by unilateral, multi-state and globally co-ordinated solutions. Energy, resource and commodity struggles and conflicts can be solved by a race of people that are mature and intelligent enough to come together to move humanity towards a more egalitarian and sustainable path. If we as a species, can't even agree on whether or not people of the same sex should be able to wed one another, we have virtually zero hope of solving those other world-reaching, culture-crossing and borderless problems that plague the precarious balance of nature and human advancement.
Let's start with the little things first, let's get those basic blocks of an evolved civilization into place. Then, when we've learned to look after our own species, can we realistically look to becoming the true custodians of the planet we call home. Until then, back to the drawing board we go.