Following the supernatural revelation at Mount Sinai, a shift back to ordinary human existence becomes necessary. The divine instruction directs the people to step down from the intense spiritual heights they had reached and resume their natural, earthly lives. The primary approach among commentators is that the call to return to their tents is a directive to reunite with their wives and resume the normal routines of married life [תורה תמימה, ביאור שטיינזלץ]. Prior to receiving the Torah, the Israelites were commanded to separate from their spouses for three days to prepare for hearing God's words. With the revelation concluded and the direct divine communication ended, they are now permitted to return to their families [רלב״ג].
This explicit permission was a legal necessity. Commentators agree that an official prohibition cannot simply expire on its own, even when the original reason for it has passed. Because God Himself had issued the restriction on marital intimacy, a direct statement from Him was required to lift the ban [תורה תמימה, רש״ר הירש]. On a deeper level, this instruction marks the end of the angelic, immaterial state the people experienced at Mount Sinai. It represents a deliberate return to human nature, physical existence, and the standard pleasures of the world [העמק דבר, מלבי״ם].
This return to physical reality stands in sharp contrast to the path of Moses. While the nation is told to step back and walk away from the mountain [אבן עזרא], Moses is commanded to remain in God's presence, surrounded by holy fire. He must continue in an angelic, non-physical state to receive the Oral Torah and the remaining laws. The Israelites, on the other hand, must return to their human lives so that they can actually fulfill these commandments as natural people living within the earthly reality of the Land of Israel [מלבי״ם, אלשיך].