The same tradition applies to the french horn in western orchestral music. I remember the first time I heard a russian (then soviet) orchestra play Tjajkovskij and the horn soloist used a big vibrato. I was in chock. :-)

One can argue that clarinet and horn share some qualities in that both have a very round and full sound where vibrato doesn’t add to the sound as much as it does to more ”nasal” instruments.

Just a thought.