I'd say they're the same thing colloquially for many (physical currency), though your point is correct.
If my kid wanted a quid to go on a ride I might say 'I've no cash on me' or 'I've no money on me', even if I had my bank card, which is money by the correct definition.
This was St. Mathieu in Haute-Vienne. Most days everything was shutdown from around 11am until 2.30 / 3pm.