People use 0.2mm hotends when they need a higher level of detail in their print. Those prints seldom need to be strong, they’re usually decorative in nature.
Yes, it takes longer.
@CarbonForge is correct. I certainly wish the prints would be faster, but my stuff is original to me and functional and I will be taking steps to further improve resolution and accuracy of my prints. I’ve been trying to get my hands on BL’s vision encoder plate for instance. I hope the 3rd time’s a charm as they were out of stock at first and then the shipment was lost.
Thanks Carbon, I did not expect stringy prime towers is normal behavior. It is a bad look to me and I am curious why BL may not see it that way. So, you’ve saved me some consternation, as once I’ve gotten things better squared away, such as dried filament, I assumed an indicator of improvement would be the absence of those strings.
Check independent Bambu dealers in your area, I guarantee some will have them in stock. It’s not like they’re consumable…or not intended to be at least 
I’ve also seen them on Ali Express.