My sibling ran into this issue once. I’m not sure if it’s a setting or a default, but vscode would assume they were working in a blank repo until they made a commit.
Sounds like this person had the project (without source control) in another IDE, tried out VSCode, and it assumed that it was all ‘changes’. I don’t use VSCode, do I can’t say for certain, but I know my sibling lost ~4 hours of project set up for the same reason (though they immediately realized it was their fault).
My dad tells stories of snowstorms back in the 70s & 80s where they would leave their truck at the end of the driveway with the keys in it and unlocked.
We live very rural (my grandparents were my neighbours growing up), and snowstorms could get bad. So everyone left their vehicles out with the keys in case someone broke down on the side of the road so that they could hop in the truck and turn it on to stay warm. Never had a vehicle so much as damaged, much less stolen.