The nice thing is, we don't have to speculate what is true or not, we have the scriptures to tell us God's truth. And God's truth tells us men are able to do good.
Mat 7:11 If ye then, being evil, know how to give good gifts unto your children, how much more shall your Father which is in heaven give good things to them that ask him?
Jesus himself said evil men know how to do good. They can give good gifts to their children. Not everything men do is evil as Biblicist would like to falsely teach.
If Biblicist had his way, he would interpret this verse to say the exact opposite of what it is plainly saying.
This is real simple, do you believe what the word of God says, or do you believe someone who is trying to tell you this scripture does not mean what it plainly says?
Make your choice.
1. It is talking about good "THINGS" - it does not say people are good.
2. It is speaking from the human perspective of "good" things as from the human perspective some things are regarded as "good" and some are regarded as "bad."
3. Even the worst of humans know "how" to give "good" things and do give "good" things to their own children.
This text does not support your view at all.