On both lemmy.world with the default UI and on the voyager app, images are resized to a reasonable size for inline display. It seems like a defect of whatever you're using that it doesn't do that.

On the web UI it looks totally fine

Nope, it's just that way by default. Drives me nuts too.

A picture is worth a thousand words. The AP article in the OP, right after the title, has a picture of Bernie Sanders, to help jog recognition and enhance immersion and feeling of reality, then has the wall of pure text after that - appropriate use of pictures enhances rather than detracts from the experience.

I too was put off by the constant use of pictures on Reddit, so I researched it a bit and found that millennials and beyond use pictures, especially the same memes over and over, to convey an entirely different experience than mere text. The memes speak to emotion and a shared set of experiences in this topsy turvy world. It being possible means that it works, and the more I thought about it, the more I came to appreciate it.

There is a second meaning to it: on hexbear voting is disabled and so they extremely often use pictures in replies to convey their thoughts instead of voting - but while on the hexbear server they are represented as tiny icons, like emojis basically, everywhere else all across Lemmy they are giant. After blocking the hexbear instance I have not seen much of those though - you might prefer that to having to block each person individually, see your Settings (not Profile), second tab, scroll WAAAAY down, to block an entire instance.

Regular pictures though, on the Lemmy webpages, likewise also do not have a way (that I know of?) to control the size. So they are all-or-nothing, have it or don't (afaik). Having them makes this place more welcoming, especially to a younger crowd, and enhancing participation helps the Fediverse to encourage a more steady stream of content and help ensure that it does not turn into a circle jerk niche set of tiny interconnected communities.

So, while a "giant" image was not intentional, an image was. Also, I only just when getting to this very paragraph in this reply noticed how significantly different the height of the image is when I have my Android keyboard open in my Firefox browser vs. when I close that, as would be done by someone scrolling. As I composed it, and chose preview to make sure that it worked, it was shown at maybe half the width and two thirds the height, but then hiding the keyboard it suddenly jumps up to full width and height. So that fact too likely contributes to people not realizing the full extent of what the picture is going to look like to others later on. It also may look different in the place it came from too, further leading to the discontinuity between what was intended vs. received.

Anyway I do try to use pictures, especially memes that are easily recognizable, whenever possible bc they seem to work better in the communication process (that is a 2-way procedure between both sending and receiving partners) than a mere wall of words. So you may want to block me, although I will preemptively say that I will miss your perspective across the Fediverse in replies such as this one, though ofc I understand that if it is driving you crazy then you may want to take steps to improve your experience.

Hopefully Lemmy or your preferred app (or some other one that you could switch to) will implement a solution that doesn't require massive effort and maintenance on your part to be constantly walling yourself off from what will end up being an increasingly larger share of the Fediverse as it grows and brings in newer and younger people, but for now the code is somewhat primitive in terms of such technical details.

In any case, I hope that this explanation helps.:-). Also, oh wow, could you imagine trying to have a conversation like this on Reddit!? :-P The technology here being far behind there does not begin to make up for the Fediverse being worthwhile, whereas Reddit is useless - as in even if I was not here, I still would not be there:-D.