You are definitely right about the politics preventing companies from drilling and such.
You are also right about biofuels not being important right now, but they get better every year, as does algae farming, and many other technologies, all of which could put a dent in oil sales.
I mentioned bioplastics because plastics is a big part of petroleum consumption that may also be hit.
The answer to your question is that right now, we are cut off from the world's number two oil producer and many countries are stockpiling for war. As soon as this conflict ends, Russian production and those stockpiles will be rereleased into the open market, likely crashing prices. The chance of enough growth happening between now and then to make new oil facilities designed to pick up the slack profitable is impossible.