OK, just a reminder that we are here to entertain ourselves and that none of this discussion is pro or anti anything. I don't have a TV but I know who these people are, although I can't speak to their talent.
I'm not sure how Bloomberg became so fabulously wealthy but he must have exhibited some talent at some point unless he won the lottery and never had a business. Of all the referenced individuals in the OP, he's the only one that matters since he's the only one with any authority. Oprah Winfrey may be one of the richest women in the world but she has no more power than I do.
Bloomberg is the duly elected mayor of NYC and NYC has had draconian gun laws since the Sullivan Act was passed to protect crooked politicians. So, he really only affects a small region and even New Yorkers can get gun permits - if they are high profile targets such as jewelers. My info on NYC is ancient so if I'm wrong, please just correct me.
As for the others, they have opinions©. They have a right to those opinions just as you have a right to yours. Being angry with someone for having opinions you don't agree with is an exercise in futility. We all agree on some things and not on others. Unless we are robots that are pre-programmed (some days I wonder), it is inevitable that we will have differences.
So, I don't think it's a matter of whose life is more valuable but whose life is more vulnerable. If you're a nobody in NYC, you can't (legally) get and carry a handgun. So, you can move to anyplace (and there are many) that is gun-friendly (like NV) or carry one illegally, just as any criminal. Or, you can follow the American Dream, make lots of money and hire a bodyguard. Or, you can go into a field where your life is at risk and carry a gun yourself. Or, you can become a bodyguard and have a gun. There are many options and some entertainer's thoughts don't really cause any change to the fabric of reality.