Bobby was a Mafia legacy, his father was a major killer back in his day, so he earned his stripes with all kinds of things besides catching bodies.
Bobby was made way before Chrissy, Eugene, etc..
Bobby...besides being a bit goofy and the appearance, he was very competent and by the end it looked like he was the most effective member of the crew. Being the brother-in-law helped but he didn't get the promotions just because of that. Tony respected his mind, demeanor, how he handled shyt etc.
I need to rewatch again soon. Just thinking about how the crew slowly got weakened to the point they just couldn't handle what they got hit with. The highest earners and best money men kept getting clipped for fukkery (Ralph, Vito). Chris getting on drugs again. Paulie never developing beyond a petty, aging gangster that didn't offer jack shyt. Plus the unlucky stuff that happened, like Gigi dying on the toilet lol. Basically all the top earners and smartest guys were gone by the end. It was just Silvio and Bobby left holding down the fort for Tony.