SBF said-
There is no right and wrong perspective, only different perspectives.
Nope, that's where you go off the deep end and get mired in a relativist trap.
The presence of different perspectives does NOT mean that all perspectives are equally valid: those with more physical evidence to support SHOULD triumph and be adopted, as they have more utility.
Perspectives are our individual models of reality: if there's tons of evidence to support the idea of the ball being an oblate spheroidal shape, then that's the most global Universal description which is used. The fact that there are people walking around who lack steropsis (depth perception) doesn't mean their inability to perceive depth cues causes a globe (a 3D object) to become a flat circle (2D). Even someone who lacks binocular vision (or a blind person) can HOLD a globe, and ascertain that it is has dimensionality to it, rather than being a flat disc.
Point being, a person's perception is not completely reliant on any one perceptive sense, but even can be derived by non-perceptive processes like logical inference, eg a blind person can conclude the Earth is a globe by being told it is, and by travelling around it's surface to end up where they departed.
Adam