Some bills are introduced knowing they will die in committee. Some times for posturing, spite or just to show that the legislature “heard” the voice of the people and reacted. There is a little more oversight now in that pork projects aren’t inserted into bills that sweeten the chances of it getting through the chambers.
A lot of time and effort is spent on the pretense of, “will it hold up in court?”. Sometimes laws are passed just to be challenged in the courts. We may be seeing this sooner than later.
Ten percent seems about right though. A lot of little laws get through that are unseen by most that play into the average.