Any design which removes friction in an application gets my blessing. Having to long press and confirm or approve some benign action is super frustrating. Is accidentally joining a call really that bad?
"Whoops"
*Drop call*
Exposing your microphone to countless strangers could in theory have worse outcomes than “woops” based off numerous factors, such as what you’re doing/talking about/listening to and how long it takes you to notice that you are broadcasting the audio of the room that you’re in.
Friction is not an automatic bad thing. The fact that you have to continue pressing down the button to keep using the feature is friction to stop you from unintentionally using the feature
It's not a huge deal in same sense as exposing parts of your initials, half masked e-mail addresses, or the last 4 digits of credit card numbers are not a huge deal, each of which could allow your adversary recover full details in some cases should they exist.