If that were true then why devote the troops to getting those wagons of supplies confiscated from the civilian population of Pennsylvania? Lee made sure that the wagons were well underway and guarded before pulling back from Gettysburg. And in the process he left tens of thousands of wounded behind. A calculated decision on his part.
He also knew the medical treatment his troops would receive if they were left behind would exceed what his own doctors could provide, given they exhausted their medical supplies over the course of the campaign.
Lee took his wounded with him after Antietam, he didn't after Gettysburg. The reason is obvious.
To suggest he left his own wounded in favor of ‘supplies’ is ridiculous, completely inaccurate, and ill informed as to ‘how things worked’ in that era.
I suppose that this is another one of those subjects where you know the data involved intimately. Even more than men like Kent Brown who wrote whole books on the subject.
Your supposition is only correct in regards to yourself, as the threads demonstrate conclusively.