No, your oil pressure is fine.
What those tubes do is pressurize the lifters. When the tube goes bad, you'll get some clacking as the lifters build pressure when engine is cold. It's not an emergency. If there's no clacking during idle when cold, don't worry about them.
I'll snap a pic of my plastic tubes (you wanna see the ones that came out of the car, I have them in a box?).

__________________
Gregg

'92 500E (Sold)
'07 E63 AMG (Sold)
'10 S550