Why would you need a 1.8 50-140? I’m curious...
Sometimes people get obsessed with setting up rules for themselves which must be followed.
The theory goes that if you are using camera X you need to be able to get the same image as you would get on camera Y. If the lenses don't have the equivalent f stop so you can get the exact same framing with the exact same depth of field, you will die.
Also, don't step on cracks in the sidewalk.
But seriously, most of the time, it's better to just make pictures and only worry about gear when it's keeping you from creating what you want.
If I want shallower depth of field, I'll pull out a prime lens . Heck, I've got a 35mm f0.95 Mitakon right here!
All camera systems are compromises and the trick is to find a set of compromises you can work with and then get on with the business of taking pictures.
Sitting around in a Fuji thread relentlessly hammering on Fuji's breaking your personal rule set is just silly.