I would guess that Tom's reservations on recommending re-jetting are based more on people's knee jerk response to do that before trouble shooting everything else, rather than arrogance.
It is synonymous with when we have a rough running, factory stock engine and make the mistake of jumping into the carburetor before looking at EVERYTHING else first.
Carl

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission