What is the point of a Lullaby?

CountOfTheFog

I'm a Freddy main and if the Survivors are asleep, I lose the benefit of so many perks like Tinkerer, Insidious, the new Ultimate Weapon, Starstruck.

Same for Huntress. I played against a poor Huntress using Insidious and Tinkerer but we could always hear her Lullaby

It seems a Lullaby simply denies you access to perks. What exactly is the upside?

I think a Lullaby should count as Terror Radius for perks.

UndeddJester

The main difference of Lullabies is they are non-directional and have a fixed unalterable range. It's quite niche, and context specific to each killer, but my understanding of it is:

Though survivors can hear the lullaby, the audio doesn't give them any cues of where it is coming from. This is useful on someone like Huntress or Trickster, who effectively wants to "flush out" survivors, to have survivors run out in to the open but without good knowledge of which way they are coming from. Contrary to popular belief, undetectable is quite good on them because it allows them to get much closer before the survivors figure they are commiting, and if they don't see where they are coming from, can run right out in front of them and make it much easier to score hits. I've seen Coconuts demonstrate this, and been caught off guard myself by a few undetectable Huntresses…

For Freddy and Sadako this is the same, because they can teleport, survivors can't easily predict where they are coming from based on other events in the game, and hearing the lullaby but not having a TR can cause them to try to escape to a tile but without knowing exactly where the killer is, running into a bad locaton, or even right into the killers hands.

It's obvious problem of course is that if the survivor hears the lullaby, they start looking out for you, and if they see you coming, all the above value doesn't mean squat, which tends to make these nuances quite map dependent.