Hardly.

Facebook - typically useless chatter about people's lives that I don't care to read or look at (and don't).

Strava - a simple means of recording my rides/runs, tracking my fitness, and sometimes seeing what some of my friends are up to (usually as inspiration to get out there and try harder).

If you think it's Facebook for cyclists, you probably haven't used it. Perhaps some people use it more like Facebook but I don't and the few I follow don't seem to either. It's easy enough to be non-social on Strava if you want as well. Just make all your rides private.