> Is that just for entertainment
"just" is just your opinion
> Do I really need (or do most people) to know
I do.
"just" is just your opinion
> Do I really need (or do most people) to know
I do.
Reading the entire sentence makes it clear that "just" refers to whether or not they "use that information in some way", and that is not an opinion.
> I do.
You cut off "the minute it happens". It's not about whether you learn it, but how rapidly.