Oil is, unfortunately, used everywhere. As you say, inflation due to high oil prices can kill people. And do you know what else can kill people? Starvation due to lower crop yields due to sudden lack of fertilisers. Ask Sri Lanka how their sudden ban on fertilisers went to see what happens when suddenly a country is forced to switch to fertiliserless agriculture.
The results from high fertiliser prices and lack of availability are drastically worse than high oil prices.
Russia has little problem withholding food resources as a way of forcing cooperation. If the US can actually get Russia to agree to play their best card in exchange for almost nothing, it could be an overall win.
It's only hypocrisy if you assume there are some greater moral principles driving the behavior of nations. There's not.
The US puts pressure on people to do what it wants, just like every other country does in proportion to its power. The US just happens to be a global hegemon so it's gets what it wants more often than not, and has disproportionate control over the narrative of what's happening. Russia is particularly good at realizing and exploiting the few pain points there are in US hegemony and uses that to its advantage.
Everything else is just propaganda/ideology to keep you from paying too much attention to what's going on. There's no moral narrative being played out here, and those driving policy in nation states don't sit in big rooms talking about what's "right". They talk about what they need to do to continue to prosper/remain in power and how to do it. They let the media handle attaching a narrative to it that makes it easy to swallow for the public.
https://www.dailypioneer.com/2022/india-abroad/india-s-oil-p...
"India's oil purchases from Russia would not violate any of the sanctions imposed by the US on that country, according to President Joe Biden's Spokesperson Jen Psaki.
Asked during her briefing on Tuesday about reports that India was planning to buy "discounted crude oil' from Russia, she said, "Our message to any country continues to be that obviously abide by the sanctions that we have put in place and recommended."
However, she added, "I don't believe this would be violating that."
Making a moral appeal to cut off petroleum commerce, she added, "But also think about where you want to stand when the history books are written. In this moment in time any support for Russia, the Russian leadership, is support for an invasion that obviously is having a devastating impact".
However, NATO allies of the US continue to import Russian gas and petroleum."