Why is stealing gear/runs from other players frowned upon so heavily here?

So I come from games where you grind, get resources, travel for sales, store, etc. And I was wondering why everyone is talking about stealing from other people as terrible?

The devs made cargo visible, and interactable with in lobbies seemigly with the HOPE that other players intercept your cargo load? They do not put you on a private lobby, or make you invulnerable, hell they even DISPLAY you on the map for other players. Part of the gameplay loop with these sales is that players have incentive to hit your sale during transport.

I know it’s an asshole move but a recent post even implied you can be reported for greifing for this, when it is really just part of the game?

There is a difference between stalking someone through multiple kills and annoying them, then robbing somebody during a game event that the developers almost display as a “rob me” sign.

So just wondering, why are people so intense about getting robbed here? It’s part of the game