I agree with you, but I don't think it's generally as bad as you paint it. The longest games I've ever played take around a dozen of hours to complete - and there weren't many of them. This of course means that I haven't and probably will never play some popular titles like The Witcher, GTA, RDR etc. that ask for a huge time investment, but there are plenty of really great games that take at most a few hours and which make you feel like after reading a nice book or watching a good movie instead of wasting time.