Nonsense. Besides the fact that it's impossible to do what you describe with a fixed bridge, it wouldn't make any difference anyway.
This is a good fact I'm quoting, and I'd like to address it.
I do not teach a death lock, tight bridge. The loop should should have a bit of space in a closed bridge, the thumb should be tight against the forefinger in an open bridge, but there should be some room for the cue to "breathe".
BHE is a shot I use rarely, however, there is enough play in the loop of a closed bridge to add a dash of english or a lot of english with powerful results.