Can I take a flight to Phuket outside the sealed flights if I'm transiting through Bangkok?

The article discusses Bangkok Airways' new flight schedule to Phuket, which is limited to certain sealed flights. Users express concern about whether passengers with tickets not on these flights can still travel to the Phuket Sandbox. The consensus is that unless the flight is booked on one of the listed sealed routes, travelers will not be permitted to continue to Phuket after arriving in Bangkok.