You're still exaggerating. Streeteasy says median for Bushwick is $3200. Zumper has it at $2850 for a 1 bedroom https://www.zumper.com/rent-research/new-york-ny/bushwick
Yes, it's possible to rent for cheaper in the outer boroughs hence why I specifically said central and convenient. If something is $1800 it's because it's a dump or a tiny studio. It's not a normal amount rent someone is paying at all for their own place right now.