I think you managed to find the only post on this forum that doesn't recommend storage networks on adedicated vSwitch before considering a "best practice".
The service console hasn't existed for a long time so whatever you're looking at it obviously quite an old recommendation. It "kind of" dedicates vmnic3 to storage so it's more separated than it looks initially.
I know I've built FC storage networks where, for obvious reasons, dedicating a NIC to storage didn't make any sense at all, and at least four people reviewed the project and called me out on it. Dedicated NICs are generally well sought after.