The definition of begging on politics is that they are always haggling on finer details.
If Imran Niazi was in power, and he had gone with Russia for cheap would invite full-time sanction that restricts revenue where Pakistan import/export depends on North America, Europe and Arab nations that are pledged to petro dollars for economy.
One way or other; it is self destructive but with leaning towards USA is less self destructive compared to Imran Niazi's decision if he had gone with Russia.
Shareholders of PTI party wouldn't let Niazi go with Russia just for cheap oil given the implication on their bank balance being frozen. Not to mention, it takes years for installation of oil delivery without refinement which Pakistan has none compared to alternative option that Pakistan has access to refined oils as well as possible loans to increase budget on Army, investments on economy and beyond depending on the intention of the government.
There is reason Russia offers cheap oil on Russian currency. It is unrefined that needs to be refined which Pakistan lacks refinery machine as well as there is no installation of delivery which takes years. Russia offers nothing other than unrefined oils and cheap cost at Russian currency which doesn't help Pakistan.
Russia has oils and army at their disposal. Pakistan has none except Nuclear which seems to be bragging rights at this moment.
The day Russia starts selling refined oils, then it won't be cheap. So what is the point of going with Russia with little to none? That is stupidity which invited ouster of Imran Niazi in no time and rightly so. That was stupid on Niazi who claimed to be dumb on interview recently on arrival at Russia during the time of Russia's invasion at Ukraine despite main establishment warned him not to go given the tensions and it was same main establishment that 'selected' Niazi over democratic elected Nawaz Sharif following the ouster in the name of selective accountability. Then 'imported' sharif succeeded 'selected' Niazi at last resort by main establishment which goes on to show the extent of stupidity that must have gone into which forced main establishment to deal with the very sharif family they ousted not long ago in collaboration with Niazi.