I believe the way the oity works it’s not in our favour, but against. Let me explain, they realised some people were very lucky. The pity works (i believe) so that you won’t get too many drops, rather than help you get a drop.
So if you’ve had a drop, the algorithm will not allow you another after X amounts of legendary chests, etc. Whilst the algorithm may also work in a way that you may get one every 4-6 months.
This way they balanced the fact that some people got 8 stones within 6 months and others none.