Meh, we should just ignore that kind of propaganda. We copy things too, we use a system to protect IP because copying is such a normal and strong human thing to do.

In fact, when we don't discuss China, most find modern software patents and copyright to be abusive.

Finally, copying UX standards has been done for ages, it gives users a comfortable way to start using a product and instead of fighting that to be unique, some rather embrace it.

It can be jarring using so many different apps if each one tries too hard to be unique.

And this is my two cents, here it makes sense to have a similar interface, it's ultimately an app with chat sessions.