Physics doesn't really support the notion that there is a beard heavy enough to cause a high-carbon steel full hollow ground razor to flex any more than a thick wedge.
From my experience, my cuts come from hesitating and hanging up. Occasionally if I have a razor that is not quite sharp enough, it skids over some whiskers and then digs in.
Or, if the razor should hang up for some reason, the lighter razor will stop and sometimes convert forward momentum into sideways motion---ouch!
Wedges almost never seem to do this to me because of their weight.
On the other hand, my nastiest cuts have come from wedges. Once they start cutting, they have more momentum...yow!!!! Ya gotta get used to them.
Finally, it seems to me that wedges are not just for heavier beards. Why can't they be used on light facial hair if they are sharp?