XLR is really for Pro use with long runs, prevents interference to signals.
There's nothing magic about an XLR connector. Their advantage in long runs is only when they're used in balanced circuits. It's not uncommon to see XLR connectors used in a conventional unbalanced circuit.
One advantage of XLR in short runs in home systems is that it is a LOCKING connection, whereas RCA connectors can be problematic.
Some XLR connectors lock (most do), some don't. Some RCA connectors lock (most don't), some do.