Looking at this IBM pc keyboard image in this article, where all the function keys are on the left, it makes sense that Alt+F4 and other similar shortcut on Windows made sense at that time, but these days function keys being at top row make such keyboard shortcuts unergonomic.
Ignorant backwards compatibility cult in a nutshell: instead of retaining the same muscle memory or, if the keys moved, having a similarly ergonomic combo, the nominal labels are preserved, defeating the original design purpose. Same with ⌃ being a pinky not retained when ⇪ replaced it