I hear what you're saying, and I understand why it's generally a good idea to offer a permalink to the tweet/post/whatever.
That being said, there's been instances (especially with regards to certain politicians on Twitter) where having the screenshot has been paramount, as the original post gets deleted.
So we're left with a few choices as I see it:
Link the original post and be done with it. Risk of the original post being deleted, making your post useless.
Link a screenshot. You could add the link to the original post in the comments
Link an archive version. A great idea, but sets an expectation for the average user to have to copy the link to the post, go to the wayback machine, add a manual snapshot, then make a kbin/Lemmy/whatever post to the archived snapshot