Sadly, the ‘things’ that arrive at stores have, nowadays, so little to do with real nature, that it’s totally not a good idea to base your judgments on that.
All the fruits and vegetables that come to the stores are at least treated with some sort of chemical for preservation and they react differently to that chemicals.
I can tell you for sure that an untreated apple, kept in a warm place, will start to spoil much faster than 6,67 days (i just happen to live in a place where we do have natural apples, still).