Honestly it's just something I heard Jonathan Little say in one of his recent webinars. If I can find it again I will send you the link. Though, I'm not sure it's something you can Google and get an accurate answer either.
I believe the disagreement stems from you comparing "us" to professionals. As I stated above they will win more often because of the player fields and tournament structures.
Consider this. Phil Helmuth has won 15
wsop bracelets, more than any other player. Yes he's won other events but for this example I'm just considering WSOP events because we know about how many there are each year. He won his first one in 1989 and his latest in 2018. So over thirty years he's only won 15 events. How many do you think he's played? Better yet, how many entries do you think he's had since several events are now reentry/rebuy?
This is the best tournament poker player playing in the highest stakes with the best structures. Most of us play low and micro stake games and have to dodge way more bullets and will dilute our winning percentage dramatically.
There are going to be outliers, like Fedor Holz epic year (2016 I believe) when he just won every other tournament he played in it seemed. But this is by no means the norm.
I'd also like to add that private games like the cards chat
freerolls kind of fall into the better players/better structure category. It's been a while since I played in one but the two level late reg they had and player pools of about 150 makes it easier for the better players to win way more often than they would in other freerolls and micro stakes games open to the public.
Hopefully this doesn't sound like I'm just arguing for the sake of arguing. Even if I'm not exactly right, which I don't know that you could actually get an exact answer, it's more realistic for low/micro stake players to not expect to win one in every 100 tournaments they play that have hundreds or thousands of entries.
the statistics I quoted are not my own but from the poker data base/google and they specifically say per 1 thousand player tournaments. are you making the 1 in 1500 up? if not please supply a link. if you have no proof or link then this is your imagination? imagination and reality are 2 different things.