She did not escape through her own merits, or by taking advantage of a situation that afforded her a chance to get away, or by people helping her as part of a pre-arranged plan on her part. The contention of most who supported the escape was that she was captured too easily, which suggested to them that her capture was with her permission and at her will. This was not the case. Whatever the similarity or distinction of your contention (and to be fair, the whole "Semirhage is too mighty to be contained" notion is not unimaginable for you), it was made in the midst of a slew of errant predictions with just that basis.

As it is, the people you cite above (with whom I agreed) were right. While various Aes Sedai might have been intimidated by her in captivity, there was no indication that any of them were so far gone as to being amenable to cooperation with an escape. No other parties were permitted access to her, so more sensible and tougher-minded people were not even given the chance to laugh in her face. And Cadsuane hit upon the key to winning the psych-out war against her, which seems highly unlikely for the people of the 2nd Age who were likely in as much awe of the Power & those who worked with it as we are of Science in the 20th & 21st centuries.