Lol.
Actual flying wise - I'd have to agree. Although I haven't tried it with lots of addons included, its physics engine doesn't feel anything like real flying - no matter how many gadgets you attach to it.
We put our chief instructor ( who is a BA pilot) in front of one which had yoke, throttles, peddles and scenery packs. Lets just say he got a bit frustrated with it...
However to get the hang of instrument nav it should be fine I'd have thought. Don't touch the yoke - just use the auto pilot to make the plane do what you want. Select one of the simple Cessnas which have a standard analogue fit. Ignore scenery packs or what you can see outside - in fact - you can make the instrument panel pretty much fill the screen. Use your real approach charts (once you've checked the radio frequencies match) to follow SIDS / STARS.
Beyond that its pretty much just a game... albeit one which has huge numbers of followers...