Shouldn’t an ethical human choose tools that do more good than harm? As long as an application does that, does it matter if it’s open source or not? The software we use in our daily lives is a personal choice and people shouldn’t be shamed for choosing a closed source application. Especially one created by an independent, craftsman software company. Sync, and other well-designed for-profit clients, benefit Lemmy, an open platform. That benefits all.
Let me add, many of us are social media refugees, fleeing exploitative and closed platforms like Reddit, Twitter, and Facebook. There is also nothing wrong with continually evaluating the closed source solutions we choose to prevent repeating past mistakes.