Whatever ranking you assign to her, she has less reason to lie than an antisemitic exile getting paid to lie by the American propaganda establishment.
If you like those horror stories check out the North Korean ones, they have oodles of stuff about people dying and reappearing, being shot out of cannons, eating human faeces, and whatever else the human imagination can come up with.
It's not about her. Mid-1970s were the golden days of the KGB. All communication in and out of the USSR was under total KGB control. All foreigners in the USSR and the people they were in contact with were monitored around the clock. You couldn't get something as basic as a copy of the New York Times in the USSR nor send a personal letter out of the USSR without a government censor going over it with a sharpie blanking out every unsuitable word. If you stepped out of the line and did or said something that the KGB didn't approve of, then there was a scale of things that happened to you. The mildest form was social ostracism. Since there was no private enterprise in the USSR, all jobs in the USSR were government jobs. You were kicked to the lowest ranks, to jobs like street sweeper that barely provided sustenance. Since there was no private property either, your apartment was taken from you and you had to move in with your relatives (if you had any) or survive in a tiny damp room of a communal apartment, sharing kitchen and bathroom with total strangers. If you had kids, their lives were ruined too: couldn't get into good schools, career prospects were limited, and so forth. On the far end of the scale, people who even then kept annoying the KGB like many dissidents did, were locked up in mental hospitals and pumped full of drugs until they became vegetables or imprisoned in forced labor camps. The last forced labor camp was closed only in 1987 during Perestroika under Gorbachev's attempts to reform the rotten country.
Unlike North Korea, I was born in the USSR and saw all that with my own eyes, and I personally know several dissidents who were imprisoned in the 1980s. To suggest that she had any freedom of speech, particularly to a foreign journalist, is deeply ignorant of the conditions at the time. People were scared to openly talk even with their relatives from the West. In 1974, a foreign journalist heard only what the KGB wanted them to hear.
That was the reality of daily life in the USSR in 1970s, not spy fiction. To anyone from the USSR, the first instinct is to check the date of that quote (pre- or post-1991?) and the rest needs no comments. You made a faux pas that revealed how little you are aware of historic context. The more you deny it, the deeper hole you dig yourself into.
If you like those horror stories check out the North Korean ones, they have oodles of stuff about people dying and reappearing, being shot out of cannons, eating human faeces, and whatever else the human imagination can come up with.