the road not taken

After reading the poem by Robert Frost,i try to fathom the profound meaning of the poem by searching the vocabularies one by one.However, that's when i realized that poem is totally different from the comprehension.We cant merely translate the poem as it showed only apparent meaning.The poem is about the choice of author's life,the author faced the junction in his life and he had to make the choice which road he should take.Ultimately he choose the one less traveled by and had made all the difference.The last two sentence "I took the one less traveled by.And that has made all the difference." are the favourite of most people as they insisted that this two embodied the strenuous undertone but i bemused.The author just wrote that "and that has made all the difference",what if the difference is the sore one?Are people going to continue to love this poem?It's depend on one's value judgement and i can just concluse that nowadays human live in a brutal and realistic society and they tend to rationalize the situation ,thus "difference" would always be the good one.Compared to those two sentences, i would prefer "i doubted if i should ever come back.I shall be tellingthis with a sigh".The last word "sigh"really left a lot of imagination to the readers.Should it be a regret one, or jest?I guess it's a jest to all of us..