“i call BS. You don’t need WiFi or cellular data to use your drone’s GPS features,”
Drones DO use WiFi and cellular connections.
DJI has established itself as the industry leader with products such as the DJI Mavic 2 Pro, considered the best available.
They use the 2.4 GHz and 5.8 GHz frequencies independently of any wifi or cellular systems.
https://robots.net/tech/what-frequency-do-dji-drones-use/