Want an easy way to see the difference that lag can cause?
Next time your in fairly good formation, ask your buddy, wingman, whoever is with you on vox what distance he see's your icon at from him. Compare it to what you see his at.
9 out of 10 there will be a significant difference in the range between yours and his.
Do this every day for a week and you'll see a significant "flux" or range in days.
More so prime time and on weekends than the relatively quiet daytime hours.
But don't take my word for it.

Lag happens, Collisions happen, asking for both sides to take damage will never work until we have totally lag free networks.