I don't have any data, but my anecdotal experience is a yes to those questions.
>Are there other ways we can get a sense of how a more healthy acceptance of mortality would manifest?
In concept, yes, I think home family death can also have a similar impact. It is not very common in the US, but 50 years ago, elders would typically die at home with family. There are cultures today, even materially advanced ones, where people spend time with the freshly dead body of loved ones instead of running from it and compartmentalizing it.
>Are there other ways we can get a sense of how a more healthy acceptance of mortality would manifest?
In concept, yes, I think home family death can also have a similar impact. It is not very common in the US, but 50 years ago, elders would typically die at home with family. There are cultures today, even materially advanced ones, where people spend time with the freshly dead body of loved ones instead of running from it and compartmentalizing it.