According to the savor team, it was quite easy for them:
“We start with a source of carbon, like carbon dioxide, and use a little bit of heat and hydrogen to form chains which are then blended with oxygen from air to make the fats & oils"
I want to guess they are glossing over a complicated enzyme they created, or other form of reagent.
I don’t know, maybe your pants are half an inch thick, and you overlooked accounting for that