Aristarchus using a large universe is evidence that he thought about parallax. It is not evidence that his opponents thought about parallax.
You are making a circular argument: you say that the Greeks rejected heliocentrism for a good reason because they invoked parallax, but you say that they invoked parallax because you assume that they had a good reason.
There is a contemporary recorded reason for rejecting Aristarchus: heresy. There is also a (good) reason recorded by Ptolemy 400 years later, namely wind speed.
Aristarchus using a large universe is evidence that he thought about parallax. It is not evidence that his opponents thought about parallax.
Uh... why would the creator of the system consider parallax an issue, and the critics not consider parallax an issue?
And you still haven't addressed my quotes from The Sand Reckoner indicating Archimedes considered heliocentrism dubious and a minority view, which should override your arguments from silence.
...You are making a circular argument: you say that the Greeks rejected heliocentrism for a good reason because
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
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