Obvious answer: institutional backing.

But I wonder why troons succeeded in garnering this kind of support while furries failed. I pull a complete blank on why. If anything, the ridiculousness of denying one's own gender is just as ridiculous as denying one's own species.

The similarities are uncanny:

• Origins in the pride/gay rights bullshit
• Delusions of self: "I am not what I am, I am what I imagine."
• Cluster effect: exposure to trannies creates trannies, just like exposure to furries creates furries.
• Insufferable personalities and overbearing self-inserting into normal spaces.
• Claiming negative reactions of the previous point as prosecution. "Literal Trans Genocide" vs "Fursecution"
• Expensive conversion to one's perfect form: Chopadickectomy vs full body Fursuit.
• Abject degenerate sexual tendencies with zero self restraint
• Subversive even to the concept of normality, seemingly proud to be a deviant.
• Riddled with mental illness: anxiety, depression, prone to violence