In bodybuilding, if you train all out for months, you will eventually injure yourself.
At best, you will fail to progress. You can't be 100% every single day.
After a week off, many bodybuilders can progress and make new gains.
My sense is, deloading as a trader is also necessary.
You must take a week off every few months.
It's just too intense.
And when you come back, you'll likely see gains.
Do it before you injure yourself (your P/L) first.