Not necessarily. Hypothetical example, but let's say I use some obscure tar command twice a month. That's too far apart for me to remember it, but often enough that it would annoy me to look it up every time. Chuck it into anki and I have a short time where I repeat it often enough so that it sticks and after that the time between repetitions quickly becomes far longer than the 14 day interval where I actually use the command.
And now I never have to look it up again :)