This is not about profit. I have dropped from about a 44 to a 38 in a very short period of time. See my post here. I would NOT be selling them if I could find someone competent to recut the suit & blazer to a 38 - and finding the 'right' person is a very expensive experiment. That blundering half-arsed know nothing at Rochefort completely butchered one RLBL suit. SF-approved Hayel attempted to recut the RLBL tux that I linked to. Another $450. It's just not practical. In retrospect, I should have taken up Cutlers offer of $750.
So I have calculated the price to be such that any less and it is more worthwhile to me to go to Cutler and pay the premium to have it professionally recut.
Congratulations on the weight loss. However, you're right to say that it is just not practical to cut down a garment from a 44 or a 42 to a 38. Because the reduction is so significant, the balance of the clothes will likely be thrown off and they will look strange (after, you'd be potentially trying to take 6 inches/15cm out of the trouser waistband alone).
Furthermore, such dramatic alterations just cost too much to make it worthwhile and it's disappointing that the tailor didn't tell you that it would be best if you cut your losses, sold or gave away the clothes, and started afresh.