Trap development is one of the easier things for me, and I've had decent traps for a while now. But also a skinny neck. I don't think they make a skinny neck look better, I think it's the opposite; a skinny neck makes your traps look better. But that's just if you have oddball development like me I guess.
A strong neck is very useful in things like wrestling and boxing, and I wouldn't mind one in football, either.
There's a lot of people who favor bridges over all other neck exercises, and sometimes to read what they say, you'd think the salvation of their souls or imminent violence was at stake.
Hell, I think you should do whatever you want that works. It's well worth it. It looks good, it's healthier, and safer.