I’m not sure you’re interpreting this correctly. Your ‘first read’ is not synonymous with your ‘best read’. It’s just the first guy, generally with the shortest route, that should come open. Every legitimate offense is designed with receivers coming open at different levels and on different sides of the field; which allows the QB to scan across the field, left to right for example, as play extends. Just because the first, short route, isn’t the one chosen doesn’t mean that the WR is bad. (Although the jury has pretty much conceded that the Bills are clearly lacking there.)