Hi guy's. I just noticed something. Why all lateral arms on W-Body are bent ?

Seriously, i have 3 w-body and all have the lateral arms bent. When i take a look on the web, all w-body have arm bent . It is normal ? They are pre-bent from GM? Or my 3 car have been towed ?

If my arms are bent, not too much, and the alignement is done without problem, do i need to change the arms or not ?

Thanks !