Is the hadith: "No man shall enter upon a woman whose husband is absent after this day of mine, unless there is with him a man or two men," used as evidence for the permissibility of اختلاط (free mixing)?

The narration about a group of Banu Hashim entering upon Asma bint Umays in the absence of Abu Bakr, and his mentioning this to the Prophet, peace and blessings be upon him, does not indicate the absolute permissibility for a woman to sit with men. The narration restricts the legal ruling to the presence of a group of righteous men, a virtuous woman being visited, the entry being for a need, for a short period, and with lawful speech. Therefore, using this narration to deduce the absolute permissibility of mixing is burdening the text with what it cannot bear, and ignoring the objectives of Islamic law in preserving honor and preventing temptation.