Evidence? Observations from our point of view (including readings from space, still fairly close, on scale) are limited to our current position etc. So how can

Evidence? Observations from our point of view (including readings from space, still fairly close, on scale) are limited to our current position etc. So how can we really tell if it's just not curvature of space and blackholes that distort our point of view and readings? Interesting anyhow, but perhaps a bit soon.