I do not suffer motion sickness, or, at least have not in the past.
That isn't to say I do not recognize or support having options available for those that do ... and, who knows, I might maybe suddenly experience motion sickness with this game because something unpredictable happens to my body, the secret alien overlords change our reality settings ... or, for any reason.
That's my stance on most things with this game, or, really, any game or piece of software. Put the options for X in there, and those that benefit from it will use it, and those that don't, won't.
When I do a backyard grill get together, I'm not vegan, but, I know folks that are, and I accommodate them with food that'll jive with their needs. I don't use every sauce, condiment, topping, spice, pepper, or other additional thing, but, I go out of my way to have a broad enough offering of options that satisfy most.
Are there leftovers? Does some food get "wasted" by not getting used? Sure. That's not going to prevent me from offering similar array of options at any future gathering.
People are also more than welcome to bring their own ... thing too, food, beer, super deadly thermonuclear spicy pepper sauce, whatever.
If everyone invited to the party is accommodated, and happy with the "features" available, whether they're used, or not, then, it's a good thing.
That's my stance. It works for backyard grill get togethers, and I suspect it's something that works for software, whether it's a game, or something else.
You have a core target "audience", but, some of them may benefit from a little extra accommodation, whether it's some extra options like FOV, Depth of Field, Head bob sliders and toggles for motion sickness, an array of color options for those of us that are color blind, subtitles for those that need it, mod support to some degree for that demographic, broad range difficulty sliders, so forth, so on, and etcetera.
Adding certain "extra" options will certainly likely tack on a bit more development time, but, in my opinion, regardless of how twitchy my grubby paws are to get this game sooner rather than later, those "extra" options even if I personally don't use them, are worth the wait.
There's more than me, and my personal preferences and tolerances out in the world.