I genuinely do not prefer politeness

[third-density-being]

When I see somebody taking their genuine thoughts, cutting out everything they feel as "impolite" or "improper" and giving me a butchered, suppressed, non-authentic version of their thoughts, I feel like I am talking to a machine. I feel there is no chance of me knowing the person's truest thoughts and self, I feel totally excluded from the potential of an actual relationship and bond with the person.

Does anyone else feel this way?

Can You really express a thought with words? I'm not so sure about it. It's like to try to present multidimensional object as flat image.
Even when One has no restrains and do not mind manners, You still have to treat words as symbols and to deduce its true meaning - what they really stands for.

Besides You can express same thing on many different ways (all of course limited as above stated). Therefore to include good manners in your expression is not equal to impoverish range/scope of words symbolical meaning. In that case the only limit is One's imagination.

Different matter is when Someone may want to be treated harshly or is simply used to such treatement - both of Self and to treat in that way Other-Selves.