Right, l realize its in the article. 
How many tournaments do you think he has gone to?
He probably didnt even want to play to begin with. 

it was mentioned in the (not even long) article:

> He said he had been wearing jeans for a lunch meeting, and "didn't even think about" swapping them for a different pair of trousers when heading to the tournament.



I think he has gone to enough tournaments to know. 
There must have been other factors involved. 

Satosora

Stacker_Sports

Magnus Carlsen quits FIDE tournament after being told to change jeans

kristapsk

Dress code is dress code but if they let him start playing then he should have been able to finish the day and just get a fine. 