I don't particularly like "infinity scrolling", as you call it. I like it less than "infinity 'Next page' buttons" as I call them now. Why would you think it is "ridiculous" that Google not offer this? I think that's an interesting/polarizing/dramatic way of putting it. I'm curious as to why you clearly believe this to be a clearly superior/better way than what it's been for so long.

That being said, it's interesting that I actually like it for the image page. I can't explain it - maybe it's just a "Well, for 15+ years I've used search this way" thing.