Are people generally good?

[Akvod]

twesterm said:

1. People generally act good.
2. People generally only act good because of consequences (Hell, law, pain, ect)
3. Therefore, people only act good because they are looking out for themselves
4. That is selfish
5. Therefore, people are generally selfish.
6. selfish is not good
7. Therefore, people are generally not good.

Why is selfish not good?