Can blocks react like DIVS?

Sort of stumped.

I have an image with text beside it. Actually a series of images with text beside them. Looks beautiful on a desktop.

On mobile – the text squishes to the right of the image.
I would like it to react like a div with the text appearing beneath said image.

I thought Gutenberg Blocks would react this way but they don’t without going in to a custom html block and building divs.

This seems like this should be a common scenario for blocks, in theory, to handle. Otherwise, blocks seem like an extra step of work and are in the way.

Am I missing something? Can someone help?

See Example

Thanks!