Good points.
That's why pyramid styles of training can be good, because you are lifting heavy but also incorporating volume, do you agree?
Also, here's something to ponder...
Instead of focusing on using heavy weights to create maximum tension, you might be better off with light weight and higher volume.
Why? Because with lighter weight, you can utilise the tempo a lot easier, really focus on slow negatives and controlling the weight. This means that you are still activating the muscle and contracting the muscle just as much, if not more, and with lighter weight, you are more likely to use proper form to get the most out of your workout.
When using heavier weights, people tend to let their form waver and focus more on making sure the weight goes from point A to point B by all means necessary.
True. I think it all comes down to relative strength. You must be able to actually contract the muscle, control the weight and create tension.