When you use cloud software, you're a guest. They set the rules. They can change them anytime. They can kick you out without explanation.
When software runs on your computer, you're the host. You set the rules. You control the access. You own the data.
Want to work offline? Your rule. Want to export to any format? Your rule. Want to delete everything with no trace? Your rule.
Your data on your machine means your rules apply. No 50-page terms of service. No arbitration clauses. No data mining permissions buried in legalese.
Just you, your data, and the freedom to do what you want with it.