p.p.s. There's been some misunderstanding of what this post means.
You don't need to do copy-pasting just to interact with other servers. The fact you're reading this post even though you're on another server shows that cross-server interaction happens seamlessly and automatically.
The copy-pasting thing is a niche option in very specific circumstances, usually if someone is looking directly at the website interface of another server (which most people don't do).