It infuses fine if you strain the bag with the back of the spoon. The tea has a more creamy texture, it's less watery.
It also reduces the temperature that the tea leaves are exposed to, which effects the taste (for the better IMO).
& It prevents a skin forming on the top.
TRUST ME.
The secret to a perfect cup of tea is...PUT THE MILK IN BEFORE THE HOT WATER.
(Tea bag will need straining before it's removed - apply pressure to the tea bag with back of spoon)
Trust me.