7 DTE, theta decay is almost nothing, you have to deal with gamma risk as well, and the rising VOL is also do harm to your position.
In my own opinion, this strategy is more like rolling a dice. You are gambling on the Earnings.
I usually short 45+ days far OTM options, so it's almost delta neuture, I earn from theta decay, hopfully IV declines or don't move too much.
So, the most risk i guess is during a fast crush...IV get extremely high and the BID/ASK spread are so much that I cannot even easily get out of my position. That's what I want to discuss with eveyone here what we can do to deal with this situation.
I ran some backtests for the last three years on the FAANG stocks using 45DTE, selling short strangles and NOT trading earnings. All of them had positive returns. However, the whenever I added a stop loss, the returns deteriorated significantly. To me, one needs gonads of steel to hold on through the drawdowns and trade these, if trading unhedged and without stops.
Truthfully, the naked shorts are not very margin efficient, and maybe short condors are more efficient.
Good luck.