Because the demand for Roses never fades, treasure hunting is one of the most consistent Kamas-per-hour activities in the game. But consistency requires attention. A human blinks, misclicks, or loses count. A bot does not.
Modern Dofus clients perform checksums on running processes. If your computer runs an OCR script, pixel-reader, or auto-clicker alongside Dofus, the client can theoretically detect it (though advanced bots run on separate hardware/VMs to avoid this). dofus treasure hunt bot