In general there isn't a reason not to use Shimano road hubs if they serve the purpose of the wheelset.
I try to find hubs with 36 spokes and I'm not sure if Shimano road hubs offer that option. Nowadays road hubs have rotor mounts so that also widens their use spectrum.
As to phil wood etc. you can get a significantly better price/quality ratio with other manufacturers if you prefer cartridge bearings.