Alignment and Form in the Gym

When people like I've heard people in a gym say, well, your alignment when you're doing this move, they equate alignment and form. Sometimes the what makes something good or bad in terms of form is not always fleshed out really well. So we've got a lot of people pulling their shoulders back because we want our glenohumeral joints to line up with our ears. But that can be poor alignment if he's pulled his shoulder blades closer, too close to the spine. The difference between good and bad would be based on whatever your parameters were,.