While I generally agree with this sentiment - it's pretty hard to maintain friendships and relationships where both parties don't talk because they're both waiting to be spontaneous.

I don't "book/plan" things with friends, but it makes a massive difference to consistently reach out and nurture friendships.

The way you're describing meeting people seems fun, but half the time folks are busy with life or other stuff to be spontaneous.

I work from home, live far away from family, and sometimes the only social interaction I get each day is getting marketing text messages from HelloFresh. I then can take the time to go speak to my local barista for ~30 seconds and buy a drink.