I always find reminiscences of 1972 and 1982 on this forum interesting.
One thing Richmond has always done well in the "modern era" is Grand Finals. We are now 7-2 and in both of the two we were favourites.
Over the long term history, obviously you can expect no better than 50-50, indeed that's what we are - sitting on 12-12.
There are a few outrageous exceptions, Collingwood 15-27, Hawthorn 13-6 (quite amazing when you consider they lost three from 1984-1987) and Melbourne 12-5, not to mention the Swans on 5-12 and St Kilda on 1-6.
Maybe we dodged Grand Final losses in 1971, 1975 and 2018 by messing up a Prelim, but on the whole, we should be prepared for the odd Grand Final loss in the coming years, which is going to hurt.