Sure, viewing a question with those titles doesn't imply (in the logical sense) that you are gay or hiding an affair but to some it may imply (in the looser English sense) them all the same. More importantly, if you're cis hetero you feel no reason to hide reading a question titled "Should I come out to my parents?" because you don't feel any implicit threat. If you're a 15-year-old gay kid in the deep south with fundamentalist parents who will totally freak out if they learn they have a gay child then that threat is there. Even if you can claim "no, I'm not gay, I was just reading an interesting thread" that doesn't eliminate that threat.
Now, in this particular example, that child will almost certainly be 100% decided not to tell their parents and not need to read such a question, but work with me here. It's easy to fill in with scenarios that almost certainly do occur and could be legitimately dangerous in a number of ways. I mean, hell, a physically abusive spouse noticing you reading "How should I deal with my spouse abusing me?" is NOT GOING TO END WELL. Even if you try to explain "No, I just thought it was interesting. Of course I don't think you're abusive."
I'll freely admit these cases are sufficiently rare among the general population but they are also cases worth protecting to the point where we're still far from overreacting.