I disagree, I would love to block NSFW instances, and I'm grateful to the users that voluntarily post in there. For me Lemmy is too searchable for me to get into those luxuries.
The key is decentralization, if an instance gets wonky, it can be cut off from the rest of the fediverse. Or at least sections of it. I suspect in the future there will be "blobs" of instances with little to no interaction with other blobs.
Using the wrong setting on a clothes dryer can cause certain fabrics to shrink. People that are gaining weight would often blame the dryer for shrinking their clothes rather than take some personal responsibility. Hence the joke is they thought it was the dryer shrinking their clothes but it was them overeating aka the refrigerator's fault.
I'll be throwing out some occasional non-seasonal Dad Jokes since the Christmas themed ones don't seem very popular.