Now, clearly, if you hold a strop rigid tight and use pressure, the slightest mistake, heck even without a mistake, will fold the edge, effectively ruining it. If you hold the strop rigid tight and use no pressure, you'll only strop the bevel, not the edge. There is no need to strop the bevel.
This statement does not make sense. The razor is honed (creating the edge) on a piece of stone that is flat and without "give." How is it possible that putting it on a taut, flat strop will touch the bevel but not the edge?

I was thinking about this as I was stropping this morning. I challenge anyone to pull their strop so tight that even just the weight of the razor lying on it does not cause the leather to deflect at all. Trying to do so will likely remove whatever your strop is anchored to before you stop deflection. Simply put, I think it would be better to stress the less pressure aspect than stern warnings about not holding the strop too tightly as too loosely is more likely to cause issues. I started with my strop lying on a table. You just can't get any more rigid than that!