I'll describe and hopefully you can give me the name of this fallacy.
Engineer tells government bridge A needs immediate repair or it will fail in the next year. Government agrees to repair. Bridge A gets the repairs necessary.
2 year passed and government comes back and says "hey, the bridge didn't fail in the last 2 years. We wasted all that money to do the repair!"
Here is another scenario.
Cardiologist tells patient he needs an immediate procedure done or in the next few months he will very likely have a heart attack. The procedure gets done. 2 years later, the patient exclaims "hey, I haven't had a heart attack at all. That procedure was a waste!"
What fallacy did the government and the patient commit? I'm sure there is a formal name for this flawed logic.
Here's another one to make it abundantly clear.
Person A always gets a flu shot every year. Person A one day exclaims "I haven't had a single flu in the last 10 years. Why am I even getting these flu shots? The flu shot is useless!"
If you say the word "gullible" slowly, it sounds like oranges. Go ahead and try it.