Even if you could spot "good" arguments that really isn't enough without knowing that it's also made in good faith. If the person making an argument doesn't actually believe what they're saying, is arguing with a particular outcome, or is arguing with an ulterior motive like flame-bait then you also shouldn't bother engaging them even if it's well-formed.
I would take a bad argument made in good faith every time over the reverse. People who speak genuinely but are passionate, emotional, or aren't the best at expressing themselves can have productive conversations. Someone who's arguing to win isn't worth your time.