You know what, the way this thread has been posed has really pissed me off.
I get that AIBU is the place for challenging discussions but honestly this subject matter is so broad and sensitive I do wonder at the motivation of the OP.
Making grief one's identity my arse. Once someone has died, everything has changed. You just can't pretend it hasn't. Even if you go the route of "we will never speak of this again" and starching the upper lip, there's a bloody great elephant in the room.
We live in a commodified and solution seeking world which serves some people well and not others - neither is wrong if it gets people through.
But that's what it is - getting through, aware that as a bereaved person you are a source of pain, awkwardness and embarrassment if you don't conform to other people's expectations, which brings extra layers of guilt and shame on top of the likely complexity around the actual loss.
When you love someone deeply, whether their loss has been expected, or sudden, it's out of your control, but the "coulda, woulda, shoulda" is for the majority a strong feature, despite resilience (ugh, I loathe that word) or rationality. For many it's utterly conflicting, throws up existential crisis, and becomes part of who you are.
The framing of the OP suggests we have much more choice than we do, because our loved one's death was not our choice, and that's the foundation of every choice going forward. We can't identify ourselves out of our grief, it's now part of us. How it is expressed is also dependent on so many factors - as I said before, society projects notions of performance upon us, and sometimes we can't even identify the roller coaster of emotions that we experience, let alone script the correct "performance".
I can be functioning relatively normally in a social setting while inside I am physically "fizzing" with anxiety. I can hold normal conversations while my internal dialogue gives me unwelcome subtext because resonant with one of my experiences. I can support others going through stuff that is similar without making it all about me, but internally I'm bracing the whole time because having an inkling of their pain is challenging.
We're sociable creatures but we've lost so much actual connection in the noise of psycho babble and superficially, that such fundamental experiences as loss and grief are, have been somewhat reduced to processes and systems. But we're not robots, and I think the biggest reason many people struggle so much is because when they can't comply, they think there's something wrong with them when actually they're just in a deep and unwanted and unfamiliar pain.
And each loss hits differently, so you don't just find it easier each time, the reverse can be absolutely true.
So if anyone else has a sour taste in their mouth, and are feeling even more unsettled on their "grief journey" (Another ugh phrase that makes my teeth itch) please accept a hug, and know you're not alone xxx