Actually I don't think of pumps and dressy shoes for business casual (meaning, not required) whereas some corporate business dress codes are very ticky about demanding pumps with heels.
I think there are feet-specific issues at play so the styles depend on that of course. For example, if a lower heel is all one needs, then upscale loafers, slipper flats, oxfords, and ballet flats are quite the business casual wear.
If a bit of heel is needed, for some people this actually adds foot comfort (not me) ,then a heeled loafer (meaning, up to 2" blocky heel) works for a lot of people who can wear the stable chunky heel but not a narrow stiletto heel. I can't even walk in a kitten heel, for example!
I have VC slipper "flat" that is not flat, but has ? something like a 1" heel that is a wardrobe workhorse and will leave me flat (!) whenever it wears out.
Boots have a big advantage as you point out for "foot stabilization" and for evening out problems between forefoot bunion width and heel width that can't be fitted in a slip-on shoe. The other advantage I get with them is that they are very good for full-length pants, which slide over the smooth vamp and also there is a nice uniform, polished appearance to footwear peaking out