Quite right. That through bolt needs to go either between a ceiling joist and another 2X bolted to the first as a "sister" lap...or through a pair of 2X8's crossing two joists or trusses--which is better still. A bolt can be run through from the top of the lap and a coupling locktighted to the bottom of the bolt so that only a small hole remains after the threaded eye is removed. Either the fake smoke detector or a small painted plastic cap can be used to disguise the hole. Any tugging, unexpected drop or a person suddenly pulling themselves up onto the suspension point will generate a remarkable amount of load for a short interval...exactly the type of load that a screw eye does not like. Dynamic loads are impressive and destructive. Better to be safe. This type of point has held up a swing with my wife or me in it while moving...thrashing, etc. Solid as the roof. And that is what you want.