These serve completely different purposes. UMC tails are for caravan parks, showgrounds, and industrial buildings in remote areas. Type 2 cables are for suburban shopping centres.
Shopping centre chargers are for folks who can't charge at home, or who do a lot of across town driving far from home. And less so nowadays as ARENA Future Fuels Fund 50kW chargers are popping up everywhere, and as EV ranges keep increasing.
In the good old days an EV needed to always be charging whenever it was parked. Think Nissan LEAF and the like. Nowadays you can probably go 3-5 days with a standard range car (assuming typical driving habits) between charging (even though nightly charging is still very much recommended).
If you can charge at home, then there's little reason to get a cable that lets you snare free power from a shopping centre unless you do a lot of driving. But if you want to, meh, get it.