Comparison itself is not new. Long before smartphones existed, people measured their harvests against their neighbor's, their children's achievements against a sister-in-law's, their home against the one down the road. Comparison helped small communities establish norms, share useful information, and motivate one another. Used in moderation, within a context you actually understand, it can be a healthy compass.
What has changed is the arena. You are no longer comparing your harvest to your actual neighbor's. You are comparing your ordinary Tuesday to the curated highlight of a stranger on another continent, a stranger whose context, costs, debts, and struggles you will never see. Multiply that stranger by the hundreds of accounts you follow, and the dozens of times a day you check your phone, and you begin to understand why comparison today behaves less like an occasional nudge and more like a constant, low-grade hum beneath your financial decisions.