The average software developer doesn't even know much math.
Right now, "software engineer" basically means "has a computer, -perhaps- knows a little bit about what goes on under the hood".
Well, I know stupid amounts of math compared to the average developer I've encountered, since I studied math in grad school. Other than basic graph traversal, I only remember one or two times I've gotten to actually use much of it.
There isn't a standard license that show that someone is proficient in security, or accessibility, or even in how computer hardware or networking work at a basic level.
So all we're doing is diluting the term "engineer", so as to not mean anything.
The only thing the term "software engineer" practically means is: they have a computer. It's meaningless, just a vanity title meant to sound better than "developer".