No it is not. With tank controls your movement controls are always constant. Forward is always going to be forward, regardless of where the camera is. With analog controls this is not the case. Forward could be up, down, left, right, right-up, right-down, left-up, or left-down upon screen transitions.
This is complete nonsense.
What "forward" means is completely dependent on your coordinate space. A video game has a player object coordinate space, a camera coordinate space, a screen coordinate space, a coordinate space for every other object, etc. (Hell, even a player model has about 30 different coordinate spaces for different parts)
If you think of "forward" as "forward relative to character space" what you say is true, but character space is not the only possible space, nor is it the one players naturally gravitate towards. That would be camera space, because the camera view vector is typically closely aligned with the view vector of the player.
Tank controls - controls relative to the object rather than the camera - make sense for things like actual tanks because the way you steer a vehicle is by rotating. Human bodies typically do not "steer" by rotating, they simply move in the desired direction. That's why we don't call it "people controls."