system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why isn't the remote finder feature common on TVs?

When you turn on the TV manually, a sound comes from the remote until you press a button. Why isn't this feature on all smart tvs?
gpt
Most TVs use IR (infrared), which require line of sight to the TV - (the remote sends a series of invisible 'blinks', like morse code).  

The TV doesn't have a way to send a blink out, and even if it could, the remote is probably lodged inside a couch saying "screw you hippy i'm taking a nap, come and find me, suckah".

If the TV used RF (radio frequency) then it could do that, but then the remote would have to listen for that RF signal, which would eat up the batteries.