This is something that both irritates and perplexes me – people who, when faced with a proposal for a positive change, respond with “aren’t there bigger problems to solve?”
Almost nobody has the power and influence to solve the big problems. Those that do, for the most part, are using that power to enrich themselves, not to solve those big problems.
All big changes are comprised of hundreds or thousands of small changes. Most of us only have the power to make those small changes. To discourage people wishing to make small changes, because there are bigger problems which they cannot solve, is defeatist nonsense.
Solve the problem that’s in front of you. Ignore the people who tell you you should be using your time and energy to solve other things. Be who you are. Use the tools you have, not those that you don’t.