This suggestion was never about welding tools and cable coils in the first place, the original thought was to give every IPC a bit of oil. I just wrote it down as a side idea, a possibility. Furthermore as already stated, those two are so easily acquired, it doesn't matter if they would be added or not.
In my opinion 50 to 100u of oil, or even less, are not game changing at all, as the moment an IPC really needs oil is when they can't move a finger anymore. Furthermore there is only one oil tank on the whole station and IPC don't regenerate blood in comparison to most other races. Squishes being the only exception i can think of, but how many water tanks are there, more than twenty?
Oil is next to EMPs the greatest weakness to IPC, and the only way to compensate for it is to use this one tank in robotics, which blows up regularly, or to hope someone with access to chem dispensers is nice enough to make you some oil, in small quantities of course.