The problem is that nothing is ever so clear cut and dry and it's always _possible_ to cut corners to rush something out, but rarely is it the right thing to do. Everyone should brush their teeth and look both ways before crossing the street, but when being chased by a killer it might make sense to skip these things. However that should be extremely rare.
The challenge is that there are no hard rules and it's highly dependent on the context. That requires mutual understanding and trust between the business and development.