Maybe the lines in Picard can be written off as El-Aurian propaganda. All that was actually shown was that Guinan had a method to summon a Q. All this talk about El-Auria fighting the Q to a stalemate could've just been El-Aurian propaganda that even Guinan might not be aware is exaggerated information.
Guinan's TNG "hand gesture" at Q might actually just be superstitious El-Aurian nonsense that actually has no effect on Q, not unlike "rain dances" or primitive rituals by ancient cultures that practitioners genuinely believe had an effect, when in reality Q isn't even threatened.
Guinan's TNG "hand gesture" at Q might actually just be superstitious El-Aurian nonsense that actually has no effect on Q, not unlike "rain dances" or primitive rituals by ancient cultures that practitioners genuinely believe had an effect, when in reality Q isn't even threatened.