... and why didn't they cite Data as precedent for giving rights to artificial intelligence?
If you're referring to Measure of a Man, there it was legally ruled that Data simply was not the property of Starfleet and for that reason did not have to expose himself to a possibly destructive investigative procedure ... unless he choose to.
The events with Lal (years later) show that artificial intelligences do not have rights (certainly not full rights
) within the Federation.
"Is he the property of Starfleet? No."