I don't really know how one could argue that the bigger picture doesn't have an impact on them, or that they're better off not knowing the big picture. The whole thing of it is, if you live in the US, one of the reasons you're spending half a paycheck on a week's worth of food is because uncle shlomo decided it was worthwhile to spend your tax dollars on missiles for Israel, weapons for Ukraine, gender reassignment surgery for dirt farmers, and gibs me dats for Tyrone.
Being ignorant of these things doesn't make you less effected by them, it just makes you more willing to go along with them. It's like a pig being led to a slaughter house. Yes, the pig that doesn't know what's going to happen to it is going to be happier than the pig that does know something is wrong, but it doesn't change the end result.
Also I find it interesting that the people who typically advocate for "ignorance is bliss" tend to be those who most support the democratic status quo. You would think they would be the most opposed to democracy since their belief system seems to naturally imply that the common man should not be deciding on governmental (big picture) policy but this is never actually the case, and these types tend to be the most ardent defenders of democracy.