Wow that is optimistic.
Edit: Yes I know US markets have done very well the last 100 years, but they were unusual circumstances. The next 100 are very likely to be different. Take a look Germany/France/Italy/UK/Japan, for more normal returns. Yes they are less capitalist - but US could be too given the way the main US parties are going.
Its just scary whenever I see people extrapolate recent returns. FIRE guys are generally dreaming -esp if they have no children.
Actually this doesn't really matter if you live for 20-40 years after you retire.
edit: (But also, you should probably not own a ton of stocks near your retirement date)
With that said, while I make sure to have contingencies in the case I do end up living for longer than expected, given the average lifespan of an American and the a mid 60s retirement age, "living for 20-40 years after you retire" is not something everyone can count on.
The other poster has a valid point: as you get close to retirement you shouldn't own too much stocks, but then if the market crash around the time you start seriously converting to bonds and stuff, you have to delay that plan and manage things a lot more closely.