The reason why people bring up how BLU specifically was in other games is because when yoshi P first unvieled the job, one of the major reasons he gave was "to be true to how blue mages were across the franchise/ stay true to the spirit of blue mage", which has then been paroted a lot by the community since. The reason we end up bringing up how it was in other games is because how it was in other games is at odds with how it is implemented in ffxiv, meaning there is a direct contradiction between one of the major arguments for limited blu and the reality of how it was elsewhere.