There was I would guess at least a decade there with NO QF international sectors departing Perth.
Bullsh@t! There has definitely been a long term decline in the number of QF international flights out of PER, but they only stopped operating to SIN in 2014 and HKG in 2013 (as I recall). The SIN flights only stopped for about 12 months.
Qantas: Farewell Perth, thanks for the loyalty ? opinion | Australian Aviation