This “expert” is an idiot.
I know several gardeners with bountiful tomato crops who say tomatoes should be picked before they’re fully ripe because ripe fruit tells the plant that it’s done it’s job, and the plant begins to wither. They swear that picking the tomatoes before full ripening extends the life (and production) of the plant.
It may depend on the type of tomato. Likely heirloom varieties do better left on the vine till red but the more modern varieties can be picked and allowed to change color off the vine.
he must be a shill for store bought tomatoes, or smokes cigarrettes and cant taste anything
you cant ship a vine ripened tomato but the flavor is way way different. I just had a huge harvest and had to make salsa and spaghetti sauce and gave some to the neighbors
Yes always question the word expert.