[ghaff]

If someone uses an AI generated image, the alternative is almost always going to be a CC-licensed or otherwise free image. Almost no one is paying for photography for a non-commercial blog post.

[rapsacnz]

The OP mentioned technical blogs, which are commercial a lot of the time. I should know, I've written a lot of them.

[ghaff]

They're "commercial" often but that doesn't mean someone necessarily has a budget (other than being paid a salary) to do them.