Why should the Greeks have surrendered to the Persians?

Answer 1

The Persians wanted a peaceful world, and their aim was to put an end to the incessant fighting between the Greek cities which spilled over into the Persian empire's Greek cities. So perhaps Greece would have been spared the endliss ongoing wars which ravaged it if a Persian peace had been imposed.

Of course the Greek cities which banded together to repel the Persians wouldn't see it that way.

From a purely military perspective, the Persian army was also much larger and much more formidable than any Greek force that could be assembled to meet them. Surrendering in advance of the conflict would have prevented all of the possibly pointless loss of life from opposing the Persians.