[former network engineer here] Yes, but those are pro standards requiring pro kit and proper planning to work reliably in their intended setting of studios and venues. You'd have to be doing something very odd in a home setting to truly require separate physical networks. The data rate for audio at home isn't ever realistically going to be over 10mbps, so 1% of a 1gig connection, and latencies per frame are in the microsecond range. It's possible if you have a really crappy switch that it might drop a frame or two, but if you are using AES67 you're using decent network hardware, right?
So separate networks are always "better" in the technical sense, but they're not really required for home use. Or at least, try without, and if you have dropouts _then_ get a better switch and/or separate the connections.