An unnecessary luxury these days, sorry.
No-one in any fleet is any more superor to those in others; however, when the budget is limited and pre-OCU training even more so (e.g. no BFTS courses for ME pilots...), cross-training both pilots to operate from the LHS unless there is a proven need is a waste of time and money.
I will readily admit that it makes sense to cross-train co-pilots to first pilot standard and thus to operate competently from brakes-off to brakes-on; if that means using the LHS because that's where the nosewheel steering is, then fine. But there is no actual need to do so in many a/c (e.g. VC10) as the co-pilots can do everything from the RHS which can be done from the LHS - except see the weather radar.