Since all cameras today do include video, then I suggest that alone is reason enough, (as long as it does not detract from single-shot).
Just because a camera includes video doesn't mean that everyone uses the video capability. There are plenty of people that would gladly buy a camea iwithout video but it makes more sense for manufacturers to just incude video and the percentage of the user base that doesn't use video can just ignore it. And the fully articulating screen does detract which is the point I think you're missing.
Then I suggest you buy a camera without a FA-LCD. Personally, I will not buy a camera without one, (not only for video but general photography where it extends the envelope of the camera).
Consider a landscape photographer where your screen is generally either flat against the camera or tilted up when conditions make it hard to see the screen or when your tripod is lower to the ground.
If I am doing (typical) landscape, I would not be using the EVF instead of LCD. But if I wanted to use the LCD, it could be flat just the same as most prior digital cameras anyway, (and aligned with the lens.
Switching from flat against the camera to tilted up is quick and efficient and composition on the screen is aligned with the camera and the tripod.
If it (only) tilts up, then I would not be able to hold the camera 3' above my head, (as I can with FA-LCD). And what about if you want/need vertical composition?
A flip out screen not only makes the composition off center
I suggest that being aligned with the lens is of primary importance when
panning, etc., and that would not be done with a flipped-out screen anyway.
but if you need to tilt the screen, the process of switcing from flat against the camera to tilted is cumbersome.
It takes "1" extra second ... (and I am being serious). It takes about 1-second to tilt a tilt-only screen, and 2-seconds to flip & twist. (still being serious)
And in this scenario there are no benefits to having a fully articulating screen.
Finally I agree, in that specific scenario, it does indeed take "1" extra second.
But it is still true that it expands the overall-envelope and enables images
NOT POSSIBLE OTHERWISE.
I agree it is more common, (because everyone always has a phone).
But if you are indeed using a "camera", (maybe on vacation with dedicated camera), and want a selfie to include with all your other photos, then WHY NOT use the camera, (and the image will be automatically included in your other photos). I suggest they will have higher IQ than with phone.
Again, you're making assumptions about the primary use of a camera.
Do you buy a camera for only "one" (primary) use ???
Sure, if your camera is for general family, travel, etc then some people will benefit from a fully articulating screen and the negatives to a fully articulating screen are minimal in that scenario. All cameras aren't used for family vacations though.
Do you know how you would may want to use/need the camera 1 to 5 yrs from when you buy it ???
Or do you want a camera usable in a larger envelope.
I consider selfie IQ only slightly above irrelevant.
Since I stated I actually have only taken "one" selfie in the last 15 years, I still appreciate the POTENTIAL and ABILITY to do it.
But we have choices of cameras with fixed LCD, tilted-LCD, and (various-types) of FA-LCD.
Personally I appreciate the widest envelope, and that includes video, even though I have NEVER shot a video with my cameras, (but still appreciate that they can -- and I might shoot one tomorrow at an air-show I am going to).
Note that I DEFINITELY expect that I will have to hold the camera
up-high over my head because there will be a large "crowd"
I will need to shoot "over". (Thanks to a FA-LCD !!!)