To be fair, it can tell you something meaningful, as it's dead easy to determine correct / optimal values for IAoA for each of the major phases of flight, and from that use the AoAI as an alternative / reserve intrument in the event of uncertainty over correctness of readings on either ASI or the AI - or for that matter simply because the AI can be a bit over coarse.
But, unless you have calibration curves compared to the in-flight condition, which may not exist at-all, you can't tell anything about the basic aerodynamic behaviour of the aeroplane.