> is there a chance that +90 minutes for security and baggage could be avoided to make the door to door time more comparable?

Blade in New York flies through high-security corridors. Check-in is like a minute. (Counterpoint: I regularly show up to my small-town airport fifteen minutes before boarding is scheduled to start, although that precludes being able to check a bag.)

That said: you can’t easily take out a building with a helicopter. That may not be true with a tankful of 700-bar hydrogen.

You still need to make sure that no one except the pilot can take over the controls and that nobody is secretly loading up the VTOL with bombs in their luggage with the intention to crash it into the side of a glass skyscraper.

Then there is the safety of the passengers. If you and the pilot are the only ones in the aircraft, there is not much risk to yourself, but if the pilot dies, then the aircraft must land autonomously. If there is a group of passengers, then a terrorist could take the passengers hostage. So you still need to check for weapons and explosives.

The only case where you could get rid of security is with a fully autonomous aircraft that carries no luggage and only a single person.

This is already the case with a bunch of small plane airlines. They are also reasonably priced (compared to chartering). I personally love JetSuiteX (JSX) and the experience is truly incredible, with just 5 minutes to board the plane from entering the hangar. No TSA, no BS. There are a few more with similar service, but as far as I know, JSX was the one that found the loophole in the regulations that allowed them to run their operations this way legally. Proliferation of small aircraft cheap to operate will make this model ubiquitous.

Edit: typos