There is no "have to" in this context. There is "choose to". The game offers the player many choices of how to play.
And that is why it fails to work and engage with people.
Both multi-player modes can offer "danger" from other players.
Only by per-arrangement, which for some defeats the object of being ready for anything.
Frontier don't seem keen to offer inescapable situations instigated by players.
Then FD need some tutouring regarding piracy and Powerplay.
Powerplay isn't special either - it's an optional pan-modal feature that offers double consensual PvP for those who wish to engage in it.
And for those who wish to play in Open in Powerplay, having someone else play in Open who then is blocked because they shoot you in a mode that allows PvP is silly. The whole point is that its ad hoc opportunism, if you them block everyone you see to win, then thats not really a great design and not compelling.
I think that Frontier's stance is quite deliberate - even if it frustrates those who'd like to impose interactions on others. Whether it is "broken", or not, depends on ones point of view.
I just see confused thinking, year on year they make predictable mistakes.
Private Groups with open membership exist.
Then great! But that on its own is still not random as Open is- only that is truly you against everyone.
Players can remove consent for any interaction at any time in this game - much to the chagrin of some players. Players cannot continue to force interactions on any player that chooses to remove themselves from the situation.
Even when that situation demands it? Piracy has collapsed because people don't seem to want time wasting interfering with credits per hour.
It all depends on the intent of the game - and this game does not force player interaction. Not everyone is playing the game to "git gud" - some play it to relax after a day in RL.
In a game about strife, conflict and danger there its awfully easy to avoid it all in Open, even though its for interactions beyond friends or NPCs. There is a difference between using the tools to build a great ship, learn to evade and simply logging out every time a triangle pops up. If you want relaxation, pick a mode, location, job etc that puts you away from harms way- that is fully in your power yet people insist on flying into the mouth of danger and wonder why it went wrong.