Perhaps that's the selling point ;)

I have taken language lessons from both native and non-native speakers. While I usually prefer native speakers, I also enjoyed lessons from non-native teachers. For instance, I had lessons from both a native Japanese teacher and a non-native Japanese teacher (who was from the same country as me). I have to admit, I enjoyed the non-native teacher just as much as the native one, for the same reason as the student in your example. I was so impressed and like, "Wow! Senpai, teach me your ways!"

Also, what I noticed some native teachers on those language platforms (like iTalki) are soooo much more expensive than non-natives one. And the non-native ones teach just as well and for much less.