"I only have two kinds of problems", I tell my boss as we are packing teas for online orders; "the kind that I can do something about, and the kind I cannot. In either case, I try not to waste energy complaining about them, but deal with them as best I can instead."
"But what about something like being sick, what about something like cancer?" he asks smugly, "you cannot do anything about it, but it is still going to destroy your life."
"My dear boomer" , I quip fondly "I can seek treatment and counsel for something like that. And even though it may not remove the disease, I am actively doing something about it, and so can better spend my energy on that instead of complaining about it."
... Or something like that, I'm not a philosopher, I just peddle dead leaves in small bags...