Bows that are not centershot nearly always work better when canted, due to the archer's paradox thing (arrow bends around the bow significantly and canting helps address this). Bows that are centershot aren't affected as much in that aspect but can sometimes benefit from some degree of cant if it helps achieve better alignment from grip to drawing elbow...which for some shooters/bow designs it does (but not always).
With regard to "peeking" (raising the head at the shot), although 'seeing the target better' is often cited as a attribute canting isn't really a big factor there since the shooter always starts forming their sight picture before drawing and releasing. I.e., if you don't see it well from the start of the draw you (logically, anyway) wouldn't be drawing on it to begin with.
Achieving good alignment (critical to good form) is probably the biggest advantage to canting in some situations, and how well it works for you really depends on the kind of bow you shoot and the shooter's own form/style (again, how they go about achieving alignment). It isn't a one-size-fits-all kind of thing. Thats one reason why those who shoot only one bow tend to be more consistent than those who regularly shoot a variety of bows/bow types. Learning a single bow does help make the alignment thing become second nature, which makes consistent accuracy easier (you already know the old saying). For us bowaholics thats usually a drawback. But there's always the bright side...it makes a great excuse for missing.