It is not practical for me either. We have no rain, essentially till November in most years, and dormancy often doesn't come till January, because of relatively warm weather till then.
However, for anyone growing in pots, or irrigating, and who can adapt the principle to their circumstances, it might be helpful to understand how to increase and/or encourage greater cold tolerance. Even, if that means a potted fig in a shed can survive 28F, and not have to be kept at 32+, that might may a huge di8fference for some people
Maybe you can tarp the area around the tree and significantly decrease the penetration of rain into the root zone of an in-ground tree - enough to make a difference.
We are not in a one-size-fits-all business - rather. a borrow-a-little-here-and-borrow-a-little-there business till we make it work for us.