Originally Posted by
btographer
Does not using sealant increase the possibility of the tire coming off the rim while cornering,
Nope.
Originally Posted by
btographer
is the sole purpose of sealant to protect from road hazard and pinch flats?
... and to help seal the tire and wheel. They aren't perfect interfaces and the sealant helps seal it all up. So the sole purpose of sealant is to seal.