I don't know how to parse this question and it makes me wonder about humanity at large.
Like, what's "being friendly" when assessing entire countries? How do you measure it? Does it apply just to strangers or is it related to having friends there? Does this require you not finding that unsolicited conversation is borderline assault? Because I'm afraid I can't do that. Is it an institutional thing? I almost got deported from Canada once, so from that baseline I'm pretty sure I couldn't agree with a lot of responses below.
But yes, I absolutely hate strangers forcing conversation on me. I find few things more grating and hostile than landing in a foreign country horrendously jet lagged and having a "friendly" cabbie try to extract my life story from me while telling me about their mortgage payments or whatever.
I once had someone in the US just sit at our bar table unprompted and strike up a conversation and I saw my life flash before my eyes. That's what psycopaths do. It's like getting punched right in your social anxiety with spiky brass knuckles.
Now that you explain it I understand and actually agree in some situations like your taxi example.
However, once I’m out doing tourist things I want to meet locals and other travelers and share stories, tips, or local lore. Meeting people in this way has allowed me to discover new places that or perspectives that I would never experience otherwise.