What problem does this address?

I went ahead and added the Featured Image block to the Single Posts Template.

I made the image so high that it would be possible for people to see the contents and read the words if needed.

If I had made the image small it would not be possible to see the contents or read the words.

What is your proposed solution?

Add "Expand on click" (lightbox) also to the Featured Image block.

So that one can add a smaller image and still making it possible for a user to click the image and see more details of the image.

@artemiomorales