I've never taught, so naturally I'd defer to you on such matters but I feel completely the opposite. I suppose it depends on what year students you're teaching too but for me, elements of functional programming first clicked for me in Python precisely because I could compare how to solve the same problems in the same language so differently.

I didn't get as lost in the incidental differences between languages like how do I print or import function, etc. but just how I might implement just one part of my program more functionally, how it'd help me reason better about that chunk.

I suppose it shows that I rep Java and Python all day, the champions of compromise, jack-of-all-trades languages.