I've also asked. My understanding is that the breed standard needs to change, but there's no movement to do so. People have invested money and years in their current stock of champions. And then there are those who say things like, "Life's too short to have an ugly dog," to justify practices like tail docking, ear cropping, and, yes, deep chests with a tight tuck that increases the likelihood of bloat.
As for large dogs with low rates of bloat, look for breeds with barrel chests. If in doubt, you can always cross against posted rates of incidence.
As for large dogs with low rates of bloat, look for breeds with barrel chests. If in doubt, you can always cross against posted rates of incidence.