The starfighters utilized by the different alien pirate forces had a long history of development.
Even though the Red Ocean was home to countless alien races, many of which had risen and fallen over many eras, many of the more technology-oriented ones often came to adopt at least some variation of starfighters and warships.
Just like how humanity stole much of the technological accumulation of the alien races it came into contact with, many of the indigenous civilizations of the Red Ocean had done the same with their own neighbors.
This caused the level of starfighters in the Red Ocean to always grow and advance over time.
There were periods of time where the development of starfighters bloomed due to their affordability and cost-effective performance against warships.