That is the whole point. MCC is a course designed to prepare for multi crew multi engine turbine IFR operations. For some reason some see the ATPL as a "start of career" qualification rather than a pre-command licence. The Part 61 Manual of Standards prescribes a set of competencies etc in Multi Crew Operations and Non-Technical Skills. For some years RPT operators in Australia have been required to integrate such competencies into their induction, training and checking processes and manuals.
So there's no reason for the requirement to hold the ATPL before hiring unless you're being hired as a Direct Entry Captain.
Off-shore operators may require an ATPL before hiring. That's an issue for the applicant to do the cost-benefit on as many have done before them. I suppose it is hardly likely that operators will happily offer their simulators and checkers to give out ATPL tests when they know the candidate will head offshore as soon as they get the licence.
As for those who want their ATPL with no MCC training and no flight test.....what else do you want without a tests or training? A Science degree? Drivers licence?
Sherm