When is cheating not cheating vs when is cheating unsportsmanlike?

[BryanV21]

This seems simple enough to penalize Team B with an unsportsmanlike technical.

There is nothing in the rules that states it's illegal, in any situation, to purposely miss a free throw. Heck, by just shooting the free throw they are turning the game into an "action contest".

But it is against the rules to go into the lane before the free throw is released. Doing so is not only a violation but actually causes the game to turn into an "actionless contest". And turning the game into an "actionless contest" is grounds for a technical foul.