The author's main argument is that actively choosing solitude is crucial for self-reflection, establishing one's identity, and achieving spiritual independence, which in turn leads to deeper relationships with others. Option 1 correctly summarizes this central theme. Option 2 focuses on a supporting detail (the negative effects of SNS) but not the main claim. Option 3 confuses 'solitude' (the author's focus) with 'isolation' (which the author explicitly distinguishes). Option 4 presents a view contrary to the author's argument that one must first establish oneself in solitude before building meaningful relationships.