Ok, so, that's a minor complaint but so far every housing distric had a fishing hole it yes. Even Goblet, that is in a middle of a desert.
Empyreum, however, does not. On one hand, it's understandable given that Ishgard doesn't have a sea next door. On the other, it does. The Sea of Clounds is literally surrounds it and we have a fhsing hole named Sea of Clounds in Coerthas Central Highlands.
Please consider putting a skyfishing hole in Empyreum to uphold this fine tradition.