Could also point out when did the demons last win a premiership compared to the tigers. Both were rabbles at the time. This isn't really a melbourne Richmond comparison... Collingwood have had the staying power. At the moment Richmond might be a bit bigger but the real test will come when you're not making grand finals in a few years.
And there you go you just answered your own question. Pies have played in 45 GF's thats 1 in every 3 years on average so they havent really had 3 or 4 decades of being crap to test their supporters resolve. Well from 2014 to 2018 their membership dropped by almost 5K, they made the granny in 2018 and their membership jumped 10K this year.