Well, now you have at least two opinions/schools-of-thought
There is merit in both. Certainly, there is also merit in putting dollars where they are
of value in a commercial product.
My own take on this: Biasing very large value electrolytic capacitors (typically less
expensive when electrolytic) in low frequency audio circuits appears to have an
audible effect that is worth the effort. Biasing small value capacitors may also
have a an audible effect... that may indeed be less audible when using certain
capacitors (often more expensive).
I'm sure both gentlemen have extensive listening experience (and diverse
targets) that led to their conclusions, both of which, are ultimately intended
to present "better" sound to the listener.
Personally, if the cost to assemble a bias-able crossover was not insanely
more expensive, and within a budget I could justify, I would lean in that
direction... just to satisfy my own curiosity.