Implications towards all human rights. If women lose rights by unintended (or intended) results this undermines the principle of all rights.
This leaves it open for lobbying via social media to close debate through harassment and intimidation and to create false impressions of public opinion.
It sets a precedent to try and remove all rights. The ECHR is already being eyed up by the right. The far left will do the same in the name of not going far enough to protect the most vulnerable in society and how the ECHR limits this.
Also it encourages further lobbying to enter into medicine and erode it being led by evidence based medicine.
Women's health in particular will suffer as most ideology in medicine in the uk currently surrounds womens health.
It will further restrict research in certain areas deemed 'politically sensitive'. All you have to do is create a narrative which makes certain areas gain this label. This works for both left and right. So breastfeeding and abortion become the battle grounds for both, whilst women caught in the middle of such a debate get shat on, as those campaigning don't really give a shit about them. Its just about winning an ideological argument.
Also medical consent gets ridden rough shot. Again there are dangers from both the left and right. Which politics focuses on ideology actual patients aren't listen to and the reasons why they are vulnerable are silenced more than they already area.
The problem when you start fucking with language and start insisting that black is white, is that people don't actually believe it. This creates hostility. And if you silence this with intimidation and harassment you create a culture where all debate dies. Not just in the thing you first arguing about but in all topics. Trans is a gateway to totalitarian style government. One where whistleblowers are the enemy and transparency is a sign of weakness and debate is promotion of hate.
Orwell didn't write primarily to make money. He wrote to warn us.