We're really far off topic here, but I'll bite because I'm bored.
Firstly though, we need to agree on what "good" and "bad" mean, in a moral sense. To me "good" is anything that helps humanity thrive, and bad is when something does the opposite. If you have a different definition, this conversation will be a waste of both our time.
> He's right though.
He is not only wrong, he is dangerously wrong. Reason is mans only natural defense. We were born without tooth and claw or even fur thick enough to survive a winter. We must use our minds to survive in this world, or perish as a species. To reject that isn't just a rejection of our nature, it is a form of suicide for our species.
Are you aware that the vast majority of the humans on this planet would not exist today without science? For example, the Haber-Bosch process allows for something like 90% of the worlds food to be grown. Much of the remaining 10% couldn't exist without genetic manipulation, or at the very least selective breeding. To reject science would be to accept a world where at least 90% of us starved and the remaining 10% led short, violent lives filled mostly with unending misery and toil. I'm deeply opposed to that and consider it "bad."
> The scientific approach has blind spots
Yes, that's how science works. We form hypotheses and test them. If those theories turn out to match the evidence we keep them, if they don't we abandon them. That's the truly great thing about science, science can be wrong, but it can never STAY wrong when done properly.
> Religion, euthanasia, etc...
All of those questions depend on culturally defined norms and taboos that may change from person to person or region to region. As long as a persons cultural, spiritual, or philosophical thinking is still "good" (based on my earlier definition) it can coexist with reason, and it's irrelevant. Science does not demand that you put no other god before it, that's religion.
I object only when another system becomes "bad", and in this context that happens whenever someone decides that their ignorance should be valued more than the science that keeps us all alive. It should not, and there are very good reasons for that.
> bad uneducated unintelligent people
I never said, or implied this, or many of the other things you insinuate here. Stating it yourself, and then arguing against it is a form of logical fallacy called a "strawman argument", and it's not just irrational, it's more than a little rude.