LinkedIn rewards reliability over frequency. A post that arrives every Tuesday for three weeks builds more than five posts in one week followed by a month of silence. That evenness is the hardest part to do by hand — it fails on busy days, not for lack of ideas.
Scheduling solves a second problem too: whoever opens the feed to post stays in the feed. When the post goes out without you, you decide deliberately when to come back for comments instead of getting stuck the moment you open the app.
For freelancers in Germany, Austria and Switzerland, data protection matters as well: EU servers in Frankfurt, invoices in euros including VAT. And one price for all channels rather than per-channel billing — add Instagram or YouTube later and the bill stays the same.