To answer the OP's question, I would say the chief pilot who does not want any cock-ups, and the CEO who doesn't want any extra costs. But of course, banning manual flying compounds this issue.
The challenge is: how to keep our manual skills sharp while flying very automated aircraft. The OP is one who clearly likes to physically fly and control every aspect. Others like to manage and guide a flight in a large airliner rather than actually move the flight controls themselves, (until the last 7 miles before landing).
Most humans prefer a job made easier. Not many of us would prefer to drive the first cars which had manual ignition timing and mixture controls on the steering column, and no synchromesh in the (manual) gearbox. Even as late as the 1970's, you had to know what you were doing to get a (non garaged) car running on a cold icy morning, We are quite happy now for all that to be designed out - I can reach in the window on the coldest day and the engine will start and run reliably with a single key turn to get it warmed up while I scrape the ice off the windscreen. In many 70's cars you had to be seated and know how to operate the throttle and choke to get the bloody thing going.
So how to maintain our flying skills? A start would be to mandate a minimum of three fully manually flown raw data approaches every six months - in appropriate conditions - and log them. We used to have to do this with practice Autolands, and a similar protocol could help make manual flying a normal, regular thing.