Hey Plant... No, not a chem teacher... I'm a PhD student of Genetics
Granted, add milk in tea, and it's no longer tea, but is that such a bad thing? For a lot of people around the world, if there's no milk or sugar, it's not tea any more... it's dishwater.
I started drinking a lot of tea in college to tide me over till mealtimes. Plain tea with no milk no sugar just wouldn't work. The research lab where I work shuts down twice a day at 11 & 4 for half an hour tea breaks. we need
milk and sugar to get us through our day.