“All the time” here means it has happened in the past, it happens today, and it will probably continue happening. It may not be a high percentage of parents but it exists. Believe it or not, Reddit is made up of human beings just like you.

"All the time" infers high frequency.

And sure, Reddit is full of humans, but it's nowhere close to a representative sample of the populations. That should be clear as soon as you start reading.

I usually read (and intend, when I write) "all the time" as "more than you'd expect", not necessarily as "with high frequency".