Let’s say I have found the best dish of food any human will ever know. It is objectively the best tasting meal one will ever eat, and it’s perfectly and completely nutritious at the same time! On top of that, it’s free! Anyone can have it, you just need to go get it!
Obviously I’m going to tell everyone I know about it. A lot of people will be interested. A lot of people will actually go try it. But not everyone will be interested and not everyone will go try it.
Why not? It’s literally and objectively the best meal anyone could ever eat! But some people just don’t care. You can bring them right to the place where they can get it, they’ll be able to see and smell it, and they’ll still not be interested. So why not just make them eat it anyway? Because when you force food down someone’s throat, it isn’t good anymore. If someone is just going to force something on you and you don’t want it, it doesn’t matter how good it is, it isn’t a good experience at all. It just makes the good thing feel bad and you will want it even less. You will actively avoid it.
This is what the Gospel is like. It’s literally the best thing, but if we don’t let people have the choice that God Himself gave all humans, we’re making it distasteful to them. You can harp on its goodness all you like, but if someone isn’t interested, you can’t make them be.