Because of the strange way you've responded to this post, it won't show what you wrote... but I'll give my $0.02 for "why use Capture 1?"...
My switch to Capture One had literally nothing to do with sharpening. I tried out the free trial when I watched a review of C1 11 from a YouTuber who wasn't even a Fuji shooter. The software just flat out looked more powerful than LR (and it is) so I tried it out. Within 2 weeks of using it I knew I was going to buy it.
There's way more to Capture One than just a minute difference in sharpness with Fuji files (yes, I said minute, Fuji files are plenty sharp in LR). It gives you very easy to use masking and layer tools, very powerful color correction tools, presets and adjustments with opacity options in layers, focus masks to check critical focus very quickly for culling purposes, much better Microsoft pen support for creating masks (I always had issues with this in LR, perhaps it's gotten better now), the list goes on...
Above all else and most importantly; C1 is SIGNIFICANTLY faster in every possible measure than LR was. Even on my weakest computer, C1 is faster than LR was on my fastest computer, and to do more complex tasks. Adobe should be ashamed of how horribly optimized their software is.
And a "reasonable" monthly payment is relative, why should I pay for PS and LR if I was only using LR? C1 also eliminates the need for PS for many users due to it's very competent layers and tools.
Basically, don't knock it until you try it 
