I'm sure you see the ridiculousness of INFPs trying to solve everyone's problems and keep everyone happy. Likewise, as an INFP I see it as kind of ridiculous of INTPs to try to educate everyone out of their misconceptions. It's kind of like playing God and trying to rescue every fallen sparrow in the world.
Better to think in terms of how one should invest one's limited time. Is educating fools (or trying to keep them happy) the most productive use of one's available time? I can see engaging in the occasional debate (or providing occasional emotional support) as an Ne intellectual exercise--kind of what I'm doing here. But there comes a point where it becomes increasingly unproductive (relative to other possible uses of one's limited time) for a variety of reasons.