We agree on morals by majority.

We sure as hell don't. I don't think something is moral or not because others agree with it or not. That'd be a pretty fucked up world if many people believed that.

Everyone agrees that murder is wrong so we make laws stating that and we punish those who dont follow. Do you call that 'forcing morals on others'?

No, because it's protecting other people's freedom. A murderer prevents others from having their own freedom. You can hurt yourself all you want, but not others without their consent. This isn't morality, it's (negative) freedom. It's measurable, where morality isn't.

All the other stuff you listed proves it's not about morality. Most people would agree it's immoral to do most of those acts. However, it's (usually) only illegal when it effects other people's rights. Sometimes people argue things enfringe on their rights to push morality too, like requiring certain clothing for example. The argument they make is always about rights though, not morality (though they may try to sway the public with a morality argument). For example, abortion. It wasn't made illegal in a bunch of places for moral reasons. It was made illegal "to protect the rights of the zygote/fetus/baby."

Sex work doesn't effect anyone else's freedom. You can choose to not engage with it if you want. Making it illegal does effect people's freedom, and also creates a hazardous environment for sex workers. If you actually want to solve the things you're complaining about, the only solution is to legalize it and install protections. If you're arguing for making it illegal then you're the one causing the issues for these sex workers. You are responsible for them not having protections, not having mental and physical healthcare, fearing going to the police when something happens, and all the rest.