This is no different than using Reclaim.ai or Calendly with your work calendar. Obviously you should do your diligence with what software you give access to your calendar, but this likely isn't the first SaaS that has access these days...
Flashy application with no contact information or legitimacy trying to access data. Your alarm bells should be going off at that point.
Whenever the erosion of privacy comes up, folks here point to regular folk being ambivalent until their identity is stolen. But even among the tech literate? Chill, don't worry, everybody is reading your work email!
It's the modern day equivalent of tossing USB sticks in the parking lot.
They could, from a technical perspective, but their privacy policy states that they don't.