Bob, in the original post to this thread, and the previous thread on this topic, no burning and dodging were done. Under those conditions, nothing is gained or lost by either using a single filter or multiple filters.
Obviously in the examples you are giving, where different parts of the print need different contrasts, this cannot be done with one filter. I use multiple filters all the time in this context, so I'm not trying to contradict anyone here.
The reason I directed OP to the Ilford paper has nothing to do with advocating for or against the split grade technique. I'm doing it because in each instance the original post signals some basic VC "foundations" would be of value. It helps to know which filters do what, etc. The Ilford paper is a good intro, without getting into unnecessary technical detail.
Said another way, people seem to often be putting the cart before the horse.