I was skeptical of this comment and went googling - found this: https://vinepair.com/articles/trader-joes-target-wines-cheap...
A long article which ends at the default lie of all "premium" products: If the price of something is high it is because of better quality. And: We would never, ever put additives into our premium products like these cheap manufacturers.
And if you believe that .. it's bridge selling time.
But I haven't read it yet, so I am not sure if it is worth it.