I have spent an enormous amount of time shooting birdshot. I hunt, shoot trap and reload as a hobby. I have never been hit by a birdshot ricochet. I have been "rained upon" by birdshot while duck hunting, but that's not a ricochet.
I'm not saying a birdshot ricochet is impossible, but it is not as likely as you imply. There are plenty of knowledgeable people who advocate birdshot for self defense because it is less likely to cause serious collateral damage.
All things considered, I think it is appropriate to make light of your assertions.
I shot skeet for a number of years, before moving on to sporting clays. Since a number of skeet targets are close incomers, ricochets do occur, although they are rare. I’ve been hit several times, once hard enough to break the skin.
That, though, was out of several 10’s of thousands of targets shot. You’re more likely to be clobbered by a piece of the bird.
I don’t see it happening in trap, as you’re never closer to the bird than 16 yards, and it’s outgoing.
When I was a kid, a quick thinking hunting partner saved me a face full when someone shooting a crippled duck skipped a load off the water and into our blind. He pulled me down just before the shot pattered off the back wall of the blind.
You can skip it off water, dirt, or pavement, but I have never had it bounce back at me.