Yeah, I thought that too, but the copy quote contains the post: number and the topic: number, which means if I share this on another site, then it will point to the actual site post/topic. 
[quote="Sam Saffron, post:1, topic:1, username:sam"]
Welcome to meta, our official discussion site
[/quote]
On my site 
In composer
Post (now it points to the support category topic which is the post: 1, topic: 1 on my site)
