Those numbers are completely normal for the list of friends and acquittances you've met over your lifetime. And of that list you would only be interacting with a fraction on a regular basis.
But that's completely different from say Reddit where you would be exposed to hundreds of thousands of different people over the lifetime of using the site.
I’m as you say, but my FB friends list have the following friend counts: 432, 139, hidden, 176, 1213, 103, hidden, 510, 179, 277, 217, 262, 233, it’s a cat, 320, 296, 317, hidden, 985, 398, hidden, hidden, 489, 995, hidden, hidden, 434, 167, hidden, 1080, 1297, hidden.
And several of those friends are in FB groups which have leaked onto my feed as a result of my friends interacting with those groups.