I suspect the average user has no idea how to pirate content such that the effort required vs the cost of a monthly subscription simply isn't worth the trouble to pirate.
Even if you do, the time it takes to find content, get what you and your family wants, ensure it is actually a complete video, make sure you haven't downloaded some malicious software, paying for it is a lot less hassle and for most users well worth it.
I was once in a corporate meeting where they were d/l graphics from the internet for a training product we sold.
When I pointed out the stuff they downloaded may be copyrighted and puts us at risk of a lawsuit, our attorney (!) said "It's on the internet so it's free." So I pulled up some of our proprietary training from other sites on the internet and asked him "So any of our competitors can use our training and case studies for free?" Answer" "That's different..."
Yea, because it's our ox that's being gored...