It's important to think about security features from the perspective of how they work in reality, in addition to worst case scenarios.
Worst case scenario for a quote post is exactly as bad as just a link, and not quite as bad as a screenshot.
In reality, quotes are more likely to be read than links; they're most fun to post than links; and they're easier to post than either links or screenshots.
@fedilore maybe that's why Gargron wants to take time to do this the right way