These folks reap the benefit of other players ability to do the bomb.
I have had too many games where I am now max level, and these new comers aren’t willing to try the bomb even if I tell them I am able to do it.
Provide a huge incentive to complete the bomb and give that reward to the person that defuses the bomb. (Maybe a sprinkle to the rest of the team for assisting in downing and gaining the body)
I’ve even had players beg me to do the bomb because they don’t want to try it or are afraid to “lose” lol.
Hopefully providing an incentive in defusing the bomb (exp or vert) will intice more players to try the bomb and not have to put so much pressure on players that can do it.