Some are made that way. THANK the folks who did it. That is how mine work no matter how they were designed.. WHY.
Roof monted A/C's are NOISY and more so if not ducted (mine are ducted) but if the blower runs all the time your brain swiftly filters the sound.. and the blowers "mask" the compressors.. So I actually have to LISTEN to the one in my bedroom (The other one it depends on when I last cleaned it) But if I set the fan on AUTO (only the bedroom has that feature) I will know when it kicks in.. BIG TIME.