Importance of Matcha

The Japanese tea ceremony is called Chanoyu in Japanese. Chanoyu literally mean "hot water for tea". Can we draw the conclusion from this that the tea (green tea/ Matcha) is the most important part of the tea ceremony? Let's imagine that we have a room with guests waiting for a bowl of tea after eating their sweets. The Teishu (tea ceremony host) realizes that there is no Matcha. What can be done? at least he can serve hot water to his guests... This might not satisfy an experienced tea ceremony visitor, but something is better that nothing, right? If there is no Chawan or water, nothing can be presented to the guests...

Please leave a comment whether you agree or disagree.