You’re right.
“Christian” has become kind of a societal or cultural label.
It’s easy to weed out the “I’m in a garage therefore I’m a car” “Christians” from the believers.
“Can you get to heaven being a good person?”
I know you can't get in, no matter what your beliefs are, if your not.
That doesn't seem to be a very good question to me. If I say "Yes," you'll tell me I believe in works-righteousness. If I say "No," I'm saying that only bad people go to heaven. (How much do I have to sin to go to heaven?)
Perhaps if you were to say "just by being a good person" it would work better.