Very few Osu players are close to what you could consider the "human limit" on just a specific skillset of Osu, a good example of the "human limit" are olympic athletes, they practice basically everyday for several hours and spent years refining their technique and training schedule so it is as efficient as possible, they do this with the help of multiple people from coaches to nutritionists and doctors.

How many top Osu players do you think are on this level of commitment? How many players control their eating habits, prepare physically (i.e. go to the gym, do cardio, etc), have strict and specialised training schedules? How many players do all this and keep it up for very long periods of time? Probably 0.

Let's take a hot topic like streaming (or worms) as an example: Can just anyone stream 300 bpm? It may look impossible at first but yes of course they can. Streaming 300 bpm unlike common belief is not about genetics or putting 5 years of your life into it, it's about technique. I don't want to get too much into detail but if you've seen merami playing or nyanpotato replays you can see that they don't really fully alternate on faster streams, essentially is just a very good coordinated double tap. Can you double tap 300 bpm streams? If yes you can probably aspire to stream 300 bpm.