I use a kettle at home, but I’ve used a microwave at work. I don’t understand what’s remotely laughable about doing so. Boiling water is boiling water.
I’ll tell what is laughable is how America restaurants typically serve hot tea. They draw a small metal container of hot water from the spigot on the side of the coffee maker, and bring it to the table with an empty cup and a teabag. By the time the bag goes in the water, the water is far too cold to infuse properly.