Houses with wire mesh are very rare in New England. except for exterior walls with stucco.

99% of old houses with interior horsehair plaster used wooden lath

Only commercial buildings with plaster walls used wire substrate and most of those were built long ago

My TP link routers are giving me very good wifi bandwidth, even 120 feet down the driveway, and 80 feet away through many walls in my shop

YMMV

I just can't see paying someone to run Cat6 in the average residence, unless you're running a commercial operation of some kind with servers or you need to feed outbuildings, etc