I wonder why they waste their time and money with all the extra bandwidth of broadcasting at 50p when they could broadcast at 25p instead as it looks no different
Quite - why are ALL broadcast TV standards, SD, HD and UHD all based around 50 or 59.94 refresh rates and image rates, and none based around 23.976, 25 or 29.97 refresh rates and image rates? (*)
576/50i, 720/50p, 1080/50i, 1080/50p, 2160/50p are ALL 50Hz and based around 50 images per second. None are limited to 25 images per second.
Why aren't we all using 576/25p, 720/25p, 1080/25p and 2160/25p? Err - because football, entertainment, and lots of genres look horrible at 25p, and a lot nicer at 50i or 50p...
(*) Ignoring edge cases like 100/120Hz UHD and niche things like Freeview HD encoders fed 1080/50i dynamically switching to 1080/25p when detecting 25psf source material.