You're not alone in thinking that to be fair, I always found it odd how many people I played football with would claim handball for everything and shout back 'there's no such thing as accidental handball'.To be fair, as far as I know, the intent was never part of the rule, it was just the way how it was interpreted. And indeed, it generated a lot of controversies (for example Barca vs Chelsea). Now, this has been explicitly removed, instead, it has been replaced with the silhouette (whatever it means).
I think that a middle-ground would have been better. Keep the intent, with the referee being able to personally check VAR and make his best judgement if there was intent or it was accidental. But for now they decided to go with this choice of 'if it touches the ball, it is handball'.
I think yesterday's was particularly clear though. He jumped with his arm, under any circumstances it was a penalty. It was bizarre, but it was a penalty under both the new and the old rules. Sure, there was no player near him, but if a keeper goes out of the zone with the ball in his hand, an indirect kick is given even if no player is near him.
Anyway, this is the the Fifa book from 2014/15:
Handling the ball
Handling the ball involves a deliberate act of a player making contact with the ball with his hand or arm.
The referee must take the following into consideration: • the movement of the hand towards the ball (not the ball towards the hand) • the distance between the opponent and the ball (unexpected ball) • the position of the hand does not necessarily mean that there is an infringement • touching the ball with an object held in the hand (clothing, shinguard, etc.) counts as an infringement • hitting the ball with a thrown object (boot, shinguard, etc.) counts as an infringement.