Other than the cold start problem which isn't discussed (what's the userbase size in Gaza?), the main argument for Bitchat (or any other off-grid network such as Meshtastic, Briar, etc.) in Gaza when mainstream E2E encrypted messaging apps already exist and are widely used, is to not be dependent on Israel for cell service.

While I do really like the idea of off-grid networks in general but for this use case, is it really that hard for a state actor to jam Bluetooth (or all ~2.4GHz communication) on a large scale?