If you truly believe all of what you just said, then you need to reassess the way you handle your equipment. I see no reason why any undue stress should be placed on the connector with a connector that has a lower profile (ie. a right angled plug) unless you are pressing it up against something that would not occur naturally.
Well, exactly what you describe
does occur 'naturally', just casually holding the M-10! As freelunch says, a RA connector with a relatively long and/or rigid strain relief 'tail', when inadvertently pressed on, will act as a lever and put significant mechanical stress on the plug and jack.
Unless the cable/strain-relief is sitting hard on the deck surface (perhaps taped there, with a rubber block underneath to support it), or else the RA plug and it's strain relief is short and the cable very supple, such as the ones I've made (also available for $25, including shipping... just kidding Guy!) 8>)
So I see what Guy is trying to achieve with the short RA plug, but I agree with Artstar's second point about the additional socket - one mickey-mouse jack is bad enough. (I've often thought of hard-wiring an input cable through the jack-hole to the PCB many times, but so far haven't bothered.)
Dave