Is it just me or…?

Since it’s summertime, and I have the time now, I’ve been going on long walks pretty much every day, and I’ve noticed half the people on the trail seem to actively avoid greeting others. Maybe about 40-50% of people I encounter will either make eye contact and nod their heads, wave, smile, say “good morning.” Everyone else(especially it seems like people under about 40 years old) straight up seem to actively avoid even making eye contact. I find it really weird that you can walk by someone(especially someone you might be passing every single day)and not even acknowledge their existence a single time. I’ve grown up here. I have heard about “Seattle freeze” but still… Maybe it’s just because I’ve worked in customer service since I was a teenager, and now I’m an educator and I’m used to greeting strangers, but I just find it really strange.