WRONG, WRONG, WRONG, WRONG!!
SWA was allowed to operate out of Love after several years of legal battles. It was the courts that ruled SWA could use Love, nobody else.
The Wright Ammendment was in resonse to de-regulation, nearly five years after the court battle over SWA and Love was done. While under regulation, SWA could not fly outside of Texas. After de-regulation in 1978, SWA began to expand outside of Texas (New Orleans being the first destination). As the powers that be in Dallas - American, Braniff and Texas International - realized that SWA could do to them outside of Texas as they had done inside of Texas, they used their political clout to stiffle the growth of SWA outside of Texas - thus the Wright Ammendment.
If you want to blame anyone about SWA being able to use Love while others could not, blame the people that used poorly written language in the bond covenants for DFW. It was their oversight in the language that allowed SWA to operate out of Love.
There are a few very good books that cover the subject.