Because not even Amazon or Google offers every service that the typical user wants. One has to maintain accounts at a variety of places for email, office, automation, etc, etc.
>I agree with you but the main thing g here, IMO, is the friction with all the alternatives you mention in getting something working.
I would venture a guess signing up for Zapier is easier than getting OpenClaw up and running. Who can get a container running on a Mac but can't sign up for a SaaS product?