Liam W
in memoriam 1998-2020
It's a title; that's why. Additionally, unless they are at the beginning or end of the title, prepositions, such as "the," aren't capitalized. However, let's save that for another time and not derail the thread.
Certain other words seem to incorrectly capitalised as well... I never captialised words such as 'then' and 'if' in titles.
I remember my Year 4 English teacher talking about titular casing...
Liam