I believe that this applies to other posts as well. Beyond choosing an image that's clear and eye-catching, we must also consider if it matches the title.

I usually ask myself, "Is this a clickbait?" "Will it encourage readers to click?"

If it's a clickbait, then it isn't worth using. But if its a clear, creative image that encourages my readers to click, then its safe to use.

I'd implement what you've suggested as well.