The helicopter market doesn't really cover personal transport, unless you're talking about the ultra-rich. And unless the roof of an office building already has a heli-pad, it's not getting landed on.
The ultra-rich heli market may be small in relative terms, but it's there. Much easier to expand it 100x than to build a new one. And once you do, you're in a good position to try something else - your tech is proven, you have a fleet, you're bringing in cash.
As for the heli market, the vehicle holds one person, not 2+, and can't fly as far as a heli. But it is less about consumer demand and more about the infrastructure, excessive noise, airspace constraints, and the dozens of other public-facing issues that would arise with any attempt at expanding that market.
It is hard to believe these will be very much quieter than a chopper.
Another helicopter crash in 2019 suggests another danger. A helicopter crash landed on the roof of a skyscraper and caught fire. The pilot was the only person killed that time, but it took firefighters about an hour to put the fire out. They apparently got it under control without too much difficulty and were lauded for a quick response.. but what if that helicopter had been packed full of lithium batteries? Lithium battery car fires are notoriously hard to put out. Such a fire on the roof of a tall building seems like a serious concern to me.
Hell, the blue led was invented in the 90s, how much would you value the first blue led at?