Everyone's needs are different. As stated, some folks don't have the time/luxury/desire to setup external lighting and having a competent camera for lowlight would be very helpful. If the noise was not a distraction/noticeable then i'd agree with you. That said, I am unsure if it is on the FX30. I'll have to dig in deeper to see how the fx30 compares in lower lit conditions to the fx3/a7siii to see if it is really a noticeable difference.
I'd say my concern is more of 4k 24p.