I agree 100%. But I'm not talking about rust. I'm refering to new metal. Those of us buying a gallon of dp50lf or ncp271 usually aren't the ones bondoing over rust
Realistically, you may have lap welded seams or have the slightest pinhole here and there from spot welding a fresh panel.
All of these areas are prone to water intrusion. Ecspecially on those with replacement panels.
(I was born and raised in Ohio Kevin. I know it can get pretty bad out there)
If you can butt weld and grind a 7ft long lower quarter panel, or a rocker to quarter joint upside down without a few tiny pinholes in your seam, you're good.