If you want to see a stupid use of 1 bar, then look no further than this:
Yes indeed folks.. that hit box is absolutely extending beyond the top of the screen.
Compare with Bionic Arm:
Ignore the 2nd bubble, that doesn't appear normally it's just that was during a moving frame that I captured. That one hit box is barely bigger than one of the 3 hit box of EX Seismo on just the ground.
Yes yes I know... Viper doesn't go horizontal but she has WAY more invincible frames and is completely safe on EX Seismo. That is legitimately unfair.
Bionic Arm stays untouched. It being unsafe on block makes it fair and it's not even among the most invincible LVL1 moves in the game.