Yeah but doing an MRI is strictly better than not doing an MRI. There is no way more information is bad unless some serious irrationality comes into play.
Gadolinium-based contrast (which you'll need for any scan worth their salt) is not completely risk free, so not entirely true. And claustrophobia is a bit more common than people think.
A significant majority of MRIs use no contrast agent.
But any tumor protocol does.
More information can lead to unnecessary procedures(by way of insistence either of patient or doctor) which have their own complications.
> There is no way more information is bad unless some serious irrationality comes into play.
I have some bad news to deliver about humans...
Doing an MRI isn't free, so it isn't strictly better than not doing one.