Some algebra teachers, yes.
I always, from high school freshman year, struggled with algebra, barely passing.
I just couldn't get past "What is x?" No matter how many times I asked, the only answer would be "it's whatever you want it to be"
Me: Then what is y"
Whatever you want it to be.
So it's the same thing?
No. Well, sometimes.
In college I had to take it, and it put me in a flop sweat.
I remember going to the instructor and telling her I really couldn't manage to get the right answer the way she did it, but if I did "this", even though I still couldn't understand it, it worked.
She told me if I did it that way, I'd be marked wrong.
Right after that, she had to take a medical leave of absence, and we got a new teacher. When I went to her, she said fine, as long as I could produce the work. That's the only thing that helped me pass.
Then, I had to take statistics, and everyone was saying how hard it was.
I sat in class so fearful.
Early on in the class the professor said "So let's say you wanted to find the temperature in the center of the air space in an attic" and he wrote "x" on the board.
You mean THAT's what x is!?
Well then, let's get to work!
I easily aced the class. I loved that professor.
Whenever someone didn't understand something, he had a million different example to explain, and didn't stop until that light bulb turned on.
I could not believe in all those years, no one even thought to give a concrete example.