Your point is well taken. Certainly there are issues and problems that gravely trouble people of integrity and good conscience.
However, while sometimes there are things we can do within our own lives to address those issues and problems, often there isn't any way to have a measurable impact.
That's not to say we should just give up. On the contrary, I think it's important to try to improve the lives of those around us within the scope of our focus, abilities and resources.
When I was a young man (in my twenties), I would often wonder if the work I was doing (tech) was really making the world a better place in a serious way. That really bothered me for a while.
But I came to realize that while we can't all have a measurable, global positive impact on the world, we most certainly can have a local positive impact on the people and world around us.
Do I create better working conditions for people in Bangladesh? No. Can I genetically engineer a more effective SARS-CoV2 vaccine? No.
But I can treat those around me with respect, act with integrity and support my community. I can do constructive work within my chosen profession. And I can speak out when I see injustice, intolerance and hate.
Will that end the pandemic or halt the war in Syria or end world hunger and poverty? No.
But if I can do my part to lift up those near me, act with honesty and integrity and create constructive solutions for the projects I contribute to, I can be satisfied that I'm having a positive impact on the world around me.
None of that requires that I be willing to die for that, but that doesn't mean I'm not having a measurable, positive impact on the world.