This is true. I suspect that in modern videos, the basic clearing work is done with smaller tools, either axes, or mortising chisels and the Bisaiguë is kept for finishing work (I have a demi-bisaiguë or Pontache) which consists of just the paring end. I've seen lots of videos of them being used and there's a wider range of new models available which speaks to the chopping end of the bisaiguë being more of a relic.

I would suspect that the removal of lots of material is more easily done with an axe or mortising chisel. Being able to get some weight behind the paring end is really useful, but I think you may need that striking force of a swung axe to really clear the chips.