what could go wrong?

so i'm new to dividends and covered call etfs, im mainly looking for new ways to slowly grow income over time but this peaked my interest. I've seen MSTY pop up in some discussions. HYPOTHETICALLY, i put $5000 into MSTY and I now have 162 shares of this ETF. i get about $86 a year in "dividends" for every share i own. 162 shares x $87dividends = $14,000?!?! sure let's assume in a year the price goes down to 80% of the value but i'm up $14k pre tax. someone please tell me this doesn't work like this.