There's also the matter that FBI policy is NOT to record interviews, so there's only an FD-302 saying you lied and nobody can see what you actually said, only what the FBI heard.
One of the comments points out that Martha Stewart was convicted for a basket of charges completely unrelated to the securities fraud that she was indicted for in the first place. Among them: two counts of lying to federal agents.
The FD-302 thing is nothing new; anybody adjacent to CPS or domestic violence will have seen the equivalent take place in therapists' offices. Client and/or therapist can rehearse abuse stories with no accountability whatsoever.
But how many times do they use it to control/ruin/subjugate people you and I have never heard of? Who speaks up for them?
The only times I've ever seen this card played is as punishment for deliberately misleading agents and wasting their time, not getting inconsequential facts wrong.
...like the high-profile Gabby Petito murder case, where Brian Laundrie's parents lied to investigators to conceal their son's whereabouts after the murder. Or that other recent one where a woman faked her own kidnapping and started a national manhunt for herself and her nonexistent kidnappers.