If you attend these festivals, you owe it to yourself and to Dhaka to also step outside the gates. Don't be someone who celebrates local and artisanal only when it's packaged with a price tag and a velvet rope. Don't be someone who feels cultured because you paid for the privilege.
Dhaka is not for beginners. Every day you make it to the end in one piece is a good day. Even survival for another 24 hours is a victory.