All the court is asking the lawyer to do is to re-file without the distracting formatting. It's not like they're throwing the entire case out. It'll still get read.
It's also worth noting that the local rules for just about every court prescribe document formatting - so it's not like any of this should come as a surprise to the attorney.
Putting this another way: If a professor tells you to submit an essay in 12 pt Times New Roman, and you turn it in using 16 pt Comic Sans - it's entirely within the professor's right to say the formatting is so distracting that it makes their job difficult and ask you to print out a revised version before they'll grade it.
It's also worth noting that the local rules for just about every court prescribe document formatting - so it's not like any of this should come as a surprise to the attorney.
Putting this another way: If a professor tells you to submit an essay in 12 pt Times New Roman, and you turn it in using 16 pt Comic Sans - it's entirely within the professor's right to say the formatting is so distracting that it makes their job difficult and ask you to print out a revised version before they'll grade it.