Gaining a master's degree doesn't automatically make you a better teacher. I'd much rather be assured that a teacher has other basic abilities (e.g. good communication skills, patience, fairness, organization skills, and even some creativity).
To get masters from "teaching track" in Finland (which is _very_ appreciated during job interviews) you need quite hefty load of padagogy and sosiology studies on top of your usual master's.
no, but its a good way to gate on intelligence
In the US, getting a master's in education probably says more negative than positive things about your intelligence - there are a ton of degree farms handing out paper.
That's why you check what school the degree is from.