This sounds like the most reasonable conclusion until you actually start experimenting. An example taken from another thread: Fire a laser of polarised light a

This sounds like the most reasonable conclusion until you actually start experimenting. An example taken from another thread: Fire a laser of polarised light at a polarised filter angled at an offset of 30°. Measure the light on the other side of the filter and you'll see it's 75% as bright. Now, you could say "We have worlds splitting independently for each photon that goes through or doesn't, and we're on all of those worlds," but that isn't explanatory -- it doesn't tell us why it looks like three quarters of the photons went through, as we always measure.