It’s the best financial advice, covid is the marketing keyword to remind you, if you don’t spend every last penny in the wallet, you can never have a chance to spend that again. Spend until you drop you plebs!
How it can be the best financial advice? If we follow that logic, then there shouldn't be a second for our wallet to be filled because no one knows what will happen in seconds, anytime... You can die anytime if something very bad or very unlucky happens around you. Instead, people shouldn't think about that and overall, people shouldn't think short-term. Always, long-term thinking is the best advice. Personally, I prefer tomorrow's chicken over today's egg.
I guess that kind of thoughts aren't considered mentally normal and healthy. You don't know when you'll be ill, when you'll have a need of money and I believe you aren't that selfish to only think about yourself in this world and just ignore the parents, friends, relatives, etc.