I'd go for it. I don't understand the idea of 'be grateful for what you have and never want anything more'. If you apply that mentality to everything, no-one and nothing would ever change (jobs, houses, relationships).
Of course there are risks in having a child. Of course it may not be plain sailing. But I think if you acknowledge that, then bringing a child into the world that you will love and nurture is never a bad thing. You have the resources to give it a good life.
Also, if no children were ever born in a crisis, then no baby will ever grow up to solve that crisis. There is climate change; a child may be born that will come up with some amazing solution that deals with it. By the rationale on here, no-one should have a baby as the world is over-populated, despite that baby, once grown up, maybe finding a cure for cancer, solving emissions-crises, finding a cure for some other virus.
I don't see why, if you have the resources, it's ok to have one or two children, but that wanting more makes you automatically selfish. Some of the happiest families I know have 4 children, 6 children.
I think, in a crisis like this, if what really hits home is how much you want another child, then go for it.