Repeat after me:
72pt is one inch tall!
72pt is one inch tall!
72pt is one inch tall!
Test it: Open up a word processor and load some reasonably normal font (e.g. Arial) and make some text that's 72pt. Then hold a ruler up to your screen: Is it about 1 inch tall? How far off the mark is it?
If you're using a modern, high-DPI display it's probably waaaaay TF off, haha. Even with regular displays it'll be off and there's actually no way to fix it because you can't tell Windows the precise DPI of your display! It tries to guess based on the DDC data given by your display but then averages the X/Y together to scale fonts. So if your X DPI is higher than your Y DPI it'll always get it wrong. Always!
Macs cheat in this area by always having displays of a fixed DPI. For the longest time all Apple displays were precisely 96 dpi (with perfectly square pixels) but recently changed it to 220-ish and made adjustments in their font rendering engine to match. I have no idea how they're handling non-Apple displays these days.
Linux, on the other hand does it right (at least X11 and KDE do) in that it scales fonts very accurately based on the DPI presented by your display via the DDC protocol (or if your monitor doesn't provide that you can set both X and Y DPI manually).
Gnome and GTK applications have the same problem as Windows though in that they only take one DPI setting and if the DDC protocol gives separate X/Y values it'll just average them and the results can be... Ridiculous. You don't really notice the weirdly-stretched fonts until you open a KDE application side-by-side with a GTK one.