Because light level advantages is a myth unless there's a huge gap.

Its a myth Light level matters only in pve not pvp In trials, ib or any other crucible, year 1 weapons still kill you as if they're year 2 weapons Thats why thorn, icebreakers all made a comeback Its something they told us to keep us grinding and infusing to make us think we are stronger if your 300 light or higher I dont believe it