Ridiculous? Not even remotely. He had the ball in the air and it popped out when he hit the ground. He was falling down the whole time. We see plays every week where a receiver catches a ball, lands on his feet, takes a step in full control of his own body (e.g. not falling to the ground), the ball gets knocked out by a defender, and it's still an incomplete pass because he didn't have control long enough or make "football moves".
If Bryant made that "catch", then we'd see 100 more fumbles every week where receivers "caught" the ball as they were going to the ground and then it popped out when they landed. Instead, we see 100 incomplete passes every week because they didn't maintain control, which I prefer 110% over your proposed alternative of the National Fumble League. Cowboys fans are complaining because the rule didn't work out for them this time, but are you going to cry over it next year if they change the rule, he makes the "catch" at your own goal line, the ball pops out when he lands, and the refs call it a catch and a fumble instead of an incomplete pass (like they've been doing as long as I recall watching football)?
The game has always been called this way regardless of how they put the words into the code or the rulebook. It was called this way prior to Megatron, this is not a new scenario. Dez knew the rules, he's always played by these rules, there's nothing new this year, nothing new last year, it's always been this way.
On top of the fact that you pretty much have to have this rule because without it games would be filled with way to many fumbles and frustration, you benefited from a "faceguarding" call last week (which, according to Cowboy fans wasn't a big factor in the win), and now you're up in arms about a rule which we see every, single, game, and you didn't even think twice about yesterday? Football 101, hold on to the ball while you are falling to the ground. It's his own fault he didn't do that and let Murray run it 2 yards into the endzone on the next play.
What exactly do you propose? We have a new special rule called the Dez rule where refs have to decide if players are making special moves as they are falling to the ground to determine whether or not it's a catch and a fumble or an incomplete pass? Please, no, anything but that, these refs have enough rules and enough problems already and there's only 1 Mike P to go around each week.