No. It's not weird. It's a very wonderful l parting compliment someone will never forget.
Is it weird to say "There should be more people like you" When it was a 10 min conversation with someone you met for the first time after you have already said goodbye to each other?
Not at all.
It's kind of like saying, "What a beautiful sunset."
The sun "sets" every day, but not always in a spectacular fashion.
Acknowledgement is then quite appropriate.
No. I hear it all the time from my good buddy Thomas Jackson.
What might be odd is what if you're secretly a psychopath . . . . Then should there really be more people like you?