Where did this notion come from that even the Attitude Era was PG? Yes, many of the episodes were PG. Some however, we rated TV 14 if there was to be more violence or cursing and adult dialog than usual. Smackdown also was the edgier show when it first happened in 1999 and from about 2002 to 2004.
Look at this clip from a 1999 Smackdown...
It has a TV 14 DLV. This means that the program is suitable for those 14 or older because it has dialog, language and violence. Since this bit set up a Rock N Sock Connection/Undertaker and Big Show Buried Alive Match we can infer that it will be talking about pie, strudel, candy asses, testicular fortitude and damnation to hell. And have lots and lots of chair shots.