It’s like Italian first course (pasta, risotto, …). It’s really forbidden to mix it with other food but so many tourists wanna eat them with salad or drink coffee as same time. It wont ever taste better. Can be added just cheese on top (if there is no fish in the sauce) and eventually pepper/chili. Drinking at same time just water or beer or wine.
It’s a matter of tradition and training our taste.

At least I require the correct way to be clearly stated and promoted.

Tea should be drunk without sugar, as they do in China and all Asia. Btw white sugar is just newly invented, last 100 years or so, while tea was used for centuries.
Being the owner of the place I would have put white, cane/brown and black sugar, with also fructose and honey on a counter with a stand saying “Tea is drunk for centuries without sugar, so try it without to taste its real flavour. If you really want to sweeten it, here you have a selection of different sweeteners: …..”

Putting sugar in high quality is like bringing a crying, smelly baby to a high-end restaurant.

And they’ll have their way again if they destroy internet radio, which they have done by lobbying Congress to raise royalty rates. Not to get way off topic, but anyone who likes internet radio should go to http://www.savenetradio.org to help save their favorite stations.