The United Nations has dubbed this specious argument “the legitimacy of blackmail.”
But when the specious claims are directed at the parents of autistic children, the situation has gone from silly to malevolent.
I can only conclude that this reasoning is specious at best, for none can see the future of paths we do not take.
plausible but not true; based on pretense; sophistic
Latin specissus 'beautiful, plausible'
c.1400, "pleasing to the sight, fair," from Latin speciosus "good-looking, beautiful," from species "appearance" (see species). Meaning "seemingly desirable, reasonable or probable, but not really so" is first recorded 1610s.