[quicklyfrozen]

Because if you're calling someone you expect them to say hello. It's not that easy to explain to a user that the call they just placed was dropped and they're really now answering a call.

[nimchimpsky]

I doubt thats the actual reason.

[Spooky23]

Telephone use case has been around for a over a century. Fucking with the UI won't go over well.

[nimchimpsky]

To paraphrase all the other recently disrupted industries.