Regardless of how he carried himself, he didn't deserve to go out like that. But that seems to be the prevailing sentiment on DR1-"crime isn't that bad in the DR, so if something happens to you it's because you deserved it or actively participated in said criminal act being perpetrated upon yourself".
The whole "don't flaunt material possessions in the DR" mantra isn't in the typical Dominican mindset, especially with people who come from extreme poverty like ball players. Even native Dominicans who work low-paying, dead-end jobs in the states can't wait to go home to flaunt whatever they have. And they are no more ostentatious than natives driving around in $100,000 US dollar jeepetas and building enormous houses in their campos.
I met a cat during Carnival who had a really cool-looking car, but for whatever reason no one was paying him or the car much mind. The people who lived there had probably seen it already a million times, but as I approached to take photos he was more happy to not only let me take them, but to have my friends and I pose in front of it. He seemed like a nice enough cat, but I got the impression he enjoyed the attention.
Why have something nice when there's no one to sweat you over it? Part of the reason some people flaunt their stuff is so others can either envy them or think they're important, and this seems to be a priority in certain social circles in the DR.
Yes, this puts a person in the line of fire, but let's put blame squarely where it belongs-on the shoulder of the delinquentes who needlessly took this man's life.