Why do players use lifeline when they don't know her abilities?

@Koochi-QWell I won't say I scan EVERY chance lol. But I do scan often. But I feel like I use it at the right times. I kinda miss the 360 scan. I wish u could choose between the 2, whether u want short-range 360 or the long range scan.

The others that irritate me are the LLs that solo rush or rush head 1st before the rest of the team just to get downed. Now we're down a person & a healer lol.