The danger of serious injury is small. (Though my wife disagrees, because she tried clipless and promptly chipped her elbow.)

These falls happen after you've stopped, so you don't go down hard.

And your first fall might prevent further falls.

I've taught children and adults how to ride a bike, not with cleats. Some students were afraid of falling, so I taught them how actors fall on the stage. First fall on your ankle, then knee, hips, elbow, shoulder. Do it in slow motion, on the grass. I had my students do it. I do it with them not so much so they are prepared for a fall but in helping them realize that falling isn't necessarily a very bad thing. Well, this has come in handy for me, because I have fallen a few times in the last four years, not because of cleats. And having rehearsed the stage fall, that's how I fell from the bike. I didn't get hurt. So I recommend it to you.