Dark Patterns
The safest or most secure thing you can conceivably do is disable "Secure Boot", which is meant to cause trouble (especially for Microsoft's competition). Don't believe alarmist misinformation.
"Dark Patterns" are defined as follows in this one Web site (UK-based): "Online nudges work hand in hand with good UX – helping you get to where you need to be on a site or allowing you to complete a purchase in as few steps as possible. They align with persuasive design principles – aiming to steer users’ attitudes, behaviours and decisions to get them to the best possible outcome. There is, however, a yin to the yang of nudges and persuasive design – ‘Dark Patterns’. They are psychological tricks that go beyond nudges to influence decision-making and cause us to do something we may not otherwise do, such as automatically subscribing to a subscription service."
To say that to disable "Secure Boot" is dangerous is more or less like falsely claiming that unfastening your seatbelt when the plane drowns in the sea is forbidden "because there might be a crash".
Microsoft does not value security of users; Microsoft goes out of its way to undermine it. Microsoft saying "security" is like a Convicted Felon in the White House saying "law and order".
By the way, the "evil maid" is Microsoft and its enablers [1, 2, 3]. █