I'm going to propose that a technically correct but inapplicable or irrelevant answer is a lawyer's answer or politician's answer. I know you wanted a non-profane term, and I would not use such mockery in formal written communication, but in spoken conversation I think you would be understood and tolerated (except when there are lawyers or politicians in the room).
There is an old joke:
A man in a hot air balloon begged a passerby, "I'm lost, can you tell me where I am?"
The passerby replied, "You are in a hot-air balloon, hovering about 30 feet above the ground."
The balloonist retorted angrily, "You must be a lawyer."
"I am," said the passerby. "How did you know?"
"Because you've given me information that is completely accurate yet completely useless."
The passerby responded, "And you must be a client."
"How so?" asked the balloonist.
"Because you don’t know where you are, or where you are going, and you expect me to solve your problem. You are in the exact same position you were in before we met, but now it is somehow my fault."
There are many versions of this joke where the balloonist is a management or politicial official or a customer, and the passerby is some other kind of professional or theoretician (accountant, engineer, economist, physicist), but in the English-speaking countries I'm familiar with, empty words go with lawyers and politicians.
I thought of spurious or specious answers or sophistry, but these words indicate falsehood or illogic masked as truth or logic, whereas the question requires that the answers be accurate. Otherwise, any synonym for pointless should suffice.