- screenshot - now you dont have to add custom styles, meta data exists, but it is not usable - you can make is to click on tweet will open a tweet, but click on tweet author will open authors profile. Also screenreaders and bots - they dont parse text from images and it is harder to make images work on smaller screens.
The solution is not as simple as - ctrl+c ctrl+v text or screenshot and call it a day. You need to consider that content will be interactive (all links should work) and accessible (for screenreaders and mobile).
___
So it is understandable why low effort approach with embedded scripts, but less secure is more popular than high effort most likely not completely working, but more secure approach.
The better way would be to use twitter api and render tweets with your own styles. Safe, accessible, interactive.