Lemmy does not use the entire screen width. The way it has been embedded in the page means that image takes up only 850 pixels of horizontal space so it could be 5x smaller and no one would be able to see the difference.
Lemmy really should be automatically resizing the images (on the server) when they are uploaded, not every single time the community is viewed (in the browser).
Mostly to avoid conspiracies. The intended users are people who want to protect vulnerable family members.
Another purpose is to demonstrate that the big social networks could get rid of disinformation if they wanted to - "look what 1 person can achieve, in their spare time", kinda thing.
The only time I use ddg is to find conspiracy sites to add to the blocklist I maintain. All the trash rises to the top in that search engine. It's rubbish.
Whenever another fixture of the 20th century leaves us, I spend a few minutes watching their clips, listening to their songs, reading their writing, or whatever they did. Gonna do that now.