Is Alexa voice command secure?

Original HubSpot URL: https://learn.simpled.uk/isnt-voice-command-on-alexa-a-bad-feature-anyone-in-my-home-has-access-to-open-the-door

it's designed for easier access for those inside. You trust them, right? Even if you don't, there's a pin code that must be announced after a command, and not everyone has that!