I think the culture is largely a store-specific thing, rather than a company-wide thing. I'd never encourage someone else to skip their breaks, and if I saw a team lead encouraging someone to do so, I'd report them for it. But choosing to do so, and being pressured to do so via an external source are different things in my eyes. It is a corporate policy that I should take my breaks, but it's not actually a law (at least not in my state), that I take them, or even be provided the opportunity to do so, so there are times where I have opted not to, because doing so results in me not closing the lanes as quickly at night, or having to stay late to finish picking an OPU, etc.
As for some of the other policies, not sure if those are actually policies my store just doesn't follow, or if they're just store-specific things people at your store enforce.
ie. TM's can definitely sit at the SB tables here, and they often do. We've never spider wrapped items that are in the electronics stock room.
As for INF, I agree 100%, it's really not a fulfillment metric, it's a store metric. When I don't find an item it's typically not because I screwed up and didn't look in the right place, it's because our inventory was wrong, or the last remaining item was damaged, etc.