Given they have a choice, why would anyone downgrade to a semi-auto BCG if they could get the more beefy version? There is a whole genre of BCG manufacturers who market tougher BCGs and they evidently sell well.

https://www.youtube.com/watch?v=HZkK70Miz60

Maybe a FA BCG is overkill but again if you could have one, why not? What is the upside?