Might be good practice EK..however it isn't always done that way. In any case this had nothing to do with the engineer and everything to do with the flight crew missing the switch position. There aren't too many things that will get you in trouble, but pressurization/flaps are two that will..pretty much any professional aircrew that I know checks these things on preflight, just before t/o and through 10 000'.
Can't believe the engineer is getting any blame here at all.