I had a miscarriage back in June 2021 (22 weeks pregnant now) and I was lucky that no one made unfortunate comments (except for the man who helped us with the move just a week after my miscarriage and seeing the new flat with 3 rooms said it was about time we started filling it up :/ He meant well, but I was a bit shocked).
The truth is, it is very common and it is a sign we can get pregnant. I say so myself, and I don't think it's insensitive. It doesn't change or remove the pain we're feeling because at least for me, I wanted THAT baby. Of course I also want THIS baby that I'm carrying now, but it doesn't change my feelings for the previous baby. He or she was meant to be born in January, and nothing is going to change the fact that I won't be having my baby in January.
I do believe that talking about how common it is helps reduce the stigma and open up a conversation. I told everyone at work, and I also chose to mention it in social media once I was ready to announce the new pregnancy. The response I got was people coming to me with their own stories, because it really is so common.
I think awareness also prepares women and couples for the possibility that it may happen to them as well. Something that I hated was when I was concerned about miscarriage in my first pregnancy, a GP told me that it wouldn't happen to me (she actually said that, which even then I was surprised about, like how do you know that). My friend said that babies were so resistant and not fragile at all and not to worry, because in her experience she'd had to have a termination at 12 weeks. My dad also said my worrying was stupid as miscarriage was unlikely. They all meant well, but they were all wrong and shouldn't have been making such blank affirmations.