At a 30,000' objective interpretation, I would tend to agree with you. However, the Torch Assay itself is a very accurate method of determination of noble metal concentrations. The inaccuracies which can and do occur regardless of the method used to perform precious metal values is solely based upon the material and methods used to sample the so described sample.
I, for one, have a basic opinion on anyone's assay for claim evaluation as about as worthless as used toilet paper. Anybody who is selling a claim or providing an evaluation of a claim with even the word "Assay" is either a fool or a liar.
Any Assay is only as accurate as of the material and process in which is used to perform the Assay. Even if you have multiple Assay houses perform a reasonably same value assessment, it still really has no bearing upon the actual value of the ground that you are attempting to mine.
For example, in my pictures below, this is a mine we had sampled and eventually ran. The vein is about 42-48" across, the vein being any values above .05 OPT.
The extremely high concentration is only about 1/8" wide stringers. However, looking at the ore body, I would have not expected the high concentration to be where it was found. By using the Torch Assay method, which included well over 100 Assay's within a 42" span, we were able to accurately determine the values and map them accordingly.
If we had used standard Fire Assays, which we do as well, we would have a tremendous amount of cost, labor, and time, and that's us doing this ourselves. For a small miner relying upon an outside Assayer, they would have been looking at well over $6,000 and a lot of time spent.
Using the Torch Assay method provides an ability to perform testing directly on site at the exact specific ore you are looking at that moment. Every ore body is different, however more times than not, the gold values are usually running in small areas within the vein; unfortunately, it's hard to extract 1/8" veinlets from the mountain.
This mine we have been able to recover around 2.75+ OPT by following the specific vein features. The reason I chose these pictures specifically, is because you would generally follow the color bands to accompany the concentrations. However, this particular vein we have continued to track, and the gold concentration moved sideways outside of the color bands, something I haven't' generally seen before. Using the Torch Assay method allowed us real-time assessment without having increased cost in material removal and processing and then determine later that we weren't' high grading as had been planned.
Anytime I perform a multitude of Torch Assay's and narrow down the values; it is then always followed up with multiple Fire Assay's. Anything less, in my opinion, would be unprofessional as well as unproductive and costly.