@Elamami3440 It's really not. It is quite literally mere milliseconds of decreased TTK from the most popular primaries, and a mere 1 bullet less fired for most weapons.
Don't believe me? Do the math yourself.
https://apexlegends.gamepedia.com/Weapons
Every weapon there tells you how they perform against Low Profile legends.
Compare that to Rock Paper Shotguns TTK calculations here: https://www.rockpapershotgun.com/2020/05/19/apex-legends-alternator-stats-dps-ttk-spray-pattern-alternator-tips/
Edit: Do I want them to increase it? Nope. The developers only put Low Profile onto legends due to their popularity, as a way to incentivize people to play other characters. They're trying to go through and nerf said legends accordingly so everyone has a chance to shine. Problem is, the only real legend that needs LP is Wraith, because no matter how much you nerf her abilities, the heart of the matter is that she's insanely good simply due to how small she is. If they were to increase the damage taken, they'd do so for everyone, meaning Wattson, Lifeline, Pathfinder, etc. would get a hard nerf despite not having the same kill/pick rate as Wraith.