Yep. Fetch enough to lose its regular importance for waves' growth.
The other day I got educated that wind
waves' lifespan is limited and so in 'endless' fetch (like say the Southern Ocean) there are no waves older than say X time period. Only seismic waves grow old ...
Sort of the regular wind
waves extend, split and multiply just like human population does - by interfering with the others others. This too justifies higher than 'due share' (say a normal distribution) of abnormal waves. Call it fat tail or something.
Anyways, would love to see one of those extreme waves, sure thing from a safe location though.