Vertical takeoff and landing vehicles operate within the atmosphere and do not require orbital insertion trajectories, making this a matter of basic definition rather than a point requiring empirical citation.
The claim states that VTOL vehicles can operate without traditional orbital insertion trajectories. VTOL aircraft operate strictly within the atmosphere (e.g., urban air mobility, drones, low-altitude operations), whereas orbital insertion trajectories are required exclusively for spacecraft reaching outer space or orbit. This is a matter of basic definition and everyday observation regarding aviation versus spaceflight, rendering the claim common knowledge.