When you only have the last minute, you've eliminated the possibility to entertain distractions. That part is good. You might enjoy more focus in these moments and feel productive.
What if it's not sustainable? What if the risk / reward ratio changes dramatically against you?
Now that you've waited to the last minute, the likelihood of some disrupting force hasn't been reduced - but you've effectively eliminated your opportunities for easy recovery.
Let's say you have to write your 200 words. You have a normal routine of spending the last hour of the night writing. It's a good plan. It's meditative. It's quiet even, now that the kids are in bed. What could possibly go wrong?
You might have enjoyed the weekend so much and now, at the end of it, you're bodily and mentally tired and the plan to spend an hour writing seems less appealing. Streaks be damned, you want some sleep.
Or, maybe you get your writing in, but it doesn't feel as good to have the self-imposed pressure of getting it done. Had you written earlier in the day, maybe now, you could just peruse community writings.
I procrastinate as much as anybody, but I don't like how it feels. Dear future self, Thanks for reading.