This is done to prevent the fire animation from obstructing the player's screen during intense PvP battles, as it can be distracting.
For example, some packs change the appearance of the fire animation and fire effect. Certain textures, like outlined ores, may be made more noticeable or even partially transparent to make it easier to spot valuable resources while focusing on PvP.
A Minecraft PvP texture pack is used in player-versus-player (PvP) modes in Minecraft.
