I also forgot to add.
You can also make a difference in many other jobs.
Not just healthcare.

Be an entrepreneur.
Do finance and banking, earn lots of money and use it to bless others.
Do a corporate job in an organization with good values, rise up the ranks and treat your colleagues right.
Many other avenues for you to make a difference without having to kill yourself in the process.
But if you have already started your course of study then it’s too late I guess for now.