In fairness though I had an android phone from 2014 with no gyroscope and it was a
problem. Accelerometer, gyro, and GPS are all complimentary features that are used to keep each other calibrated. That phone was absolutely terrible in cities (NYC and LA) because the GPS would get confused by GPS signals echoing off skyscrapers, and all of a sudden it decides you're randomly bouncing around 1/4 mile going random speeds and directions. Navigation was unusable in dense cities.
Going without a gyro or accelerometer is fine under normal conditions because you've got 2-of-3 so you can synthesize the output from the remaining sensor (my phone had synthetic gyro). But once you lose GPS fix you've lost your last degree-of-freedom and the only remaining sensor is the accelerometer, at which point the system goes into gimbal lock and the platform loses its fix.