Yeah, sorry, but I just don't agree with the spirit of the comment, and I think it's thinking like this which leads programmers to over-engineer web applications, which usually harms user experience and wastes company money.

Absolutist statements like "no, you should not do a full form post just to toggle a checkbox" are just silly. There is no minimum bound beneath which a standard web browser form submission doesn't make sense, and writing extra JavaScript code to not only manage an asynchronous network request but also handle subsequent behaviours for success, failure, timeout, etc., is additional complexity which incurs additional cost and a greater potential for system failure.

Sometimes these implementation details and associated costs are necessary, but in most cases they aren't, and it's not an ideal perspective economically to default to the more expensive and complex implementation, especially for dubious benefit.