If you pair else with for, it could be confusing. I don't think the keyword else was a great choice for this syntax, but if you pair else with if which contains break, you can see it actually makes sense. else is barely useful if there is no preceding if statement and I believe this is why the syntax designer chose the keyword.
Let me demonstrate it in human language.
for each person in a group of suspects if anyone is the criminal
break the investigation. else report failure.