Vikram Seth does the same thing with the ending of "a suitable boy" as does Anne Proulx in "the shipping news"
Writing of one's own mortality in these situations obviously invites the final word, but it actually doesn't have to be cast as such.
For this author the situation is terrible, but the writing doesn't have to echo that finality, there's a choice to be made.
He is also a (one-time) porn actor :)
* https://lithub.com/how-did-reactionary-french-novelist-miche...
I mean sounds pretty boring stuff really.
Although I didn't know he was an incel celeb.