There is a real problem imho in propagating the believe that "mis-gendering" is in and off itself offensive.
As pp's have already stated it's actually being used as a mechanism that confers your tacit acceptance of the notion of gender choice.
Importantly it also strips away the ability to accurately report, record and inform events.
Take recent examples of news articles about speakers corner for example.
There was a very clear implied bias in reporting where the sex of the accused was withheld. A story about two female protesters being in a scuffle vs a Male in their twenties lamping a 60 year old woman gives a very different slant in ostensibly the same incident.
In a similar vein, whilst reporting the campaigns of trans prisoners to be moved to the female estate, whilst withholding the names under which they were convicted (so as not to commit the "offence" of dead naming) means it's very difficult to verify the crimes for which they were convicted.
This manipulates public reaction. How empathic would people really feel about the rights of a man convicted of many sexual assaults to be put in a woman's prison?
Statics get equally manipulated by the same notion. How long before we see a sharp upturn in violent sexual crimes by women? How many future policies and legislation will be compromised by data that's factually incorrect?