I've definitely used the person rising on the heart. I've also seen it many times. I think you were tge first one to encourage me to you my own photos because you like the ones I use. So I did. I love using my own original because many times I capture the real time emotion in the frozen pixel.
I think it could be laziness, lack of effort or just not knowing how to match an image with your words. It could be any of those things. Ienjoyy the process of choosing an UnSplash image because it takes me a long time. I'm very picky.