Cheap chopsticks at expensive restaurants

In my time in Japan I've noticed at almost every restaurant I'm offered cheap wooden chopsticks which splinter at the end and are asymmetrical. It doesn't bother me, but it's surprising to get these at places that cost 5000-12000 yen per person, including high end kaiseki and sushi places. It especially surprises me because the dish-ware at these places is beautiful.

Any ideas why this is the case?

Edit for future viewers: while it is true that I experienced some low quality reusable chopsticks, apparently there is a type of chopsticks called Tensoge bashi that is indeed considered high quality in Japan (thanks u/alexklaus80 u/tepodont).