If there were really UFOs out there, they would have conquered us and either enslaved us or eaten us.
You don't let the competition develop to a position where they can threaten you.
That's why we're so concerned about Iran.
And you take even less chances with some alien species.
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Sounds like that all or nothing thinking again, to me.
Or perhaps unimaginative. There are a number of logical possibilities otherwise.
We all go through life doing what seems right to us. Everyone's mileage varies.
I want firm answers before I declare I believe in something. Others don't require that.
It's a personality issue, and possibly a faith issue. Doesn't make you wrong or right. Just makes you different from me.