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Imagine beeing in a millionaire hug machine
(i.imgur.com)
They say that getting squeezed can release fealings of anxiety. Imagine how good it must feel getting crushed by titanic depth pressure.
The real problem was just the person making it being too cheap/lazy to do any sort of safety certification on the submarine (and also picking the cooler sounding material over the one best suited to build a submarine). Don't blame it on logitech.
Using an off-the-shelf gamepad for the controls was part of that cheap/lazy design philosophy.
Of course a Logitech pad isn't a good idea to drive a submarine. It isn't meant to be one.