Im sure there are 10 hour traders. But this is not my experience. I traded the vast majority of the 251 trading days in 2019. There was not a single day this year I traded for more than 5.5 hours. A typical day, Im sitting at a desk for maybe 2-3 hours, or perhaps laying on the couch with computer in lap, or laying on my side, or at a standing desk. Personally, I'm able to focus in all of these physical positions.
The strategy I trade averages 5 signals a day. I can easily see the choppy periods, and at this time, I do not trade. I set some alerts for price levels which I think indicate the choppy period is over. In the meantime, I do something else around the house.
Once I enter a trade, I have a fixed target/stop and there is nothing to do in that time but wait. The computer will tell me when one of those exits is reached, at which point I get back to trading. In the meantime, again, I'm free to move about or do anything else I want. Call family/friends, read something, enjoy some food, stretch, take a nap. I also usually have foreign language audio playing in the background, as I try to develop this skill when trading is slower. So all of the hours have some value to me.
Moreover, while the early part of the US trading session is quite active, the afternoons are typically slower and yield less signals. I could turn a profit if I only traded the first 2-3 hours a day. However, I ENJOY trading, and I don't feel the latter half of day is a burden to me or that it erodes profits. If some days I don't feel like trading, then I do something else.
Certainly there are many, many times I spent 10+ hours sitting, but that was outside of my core trading hours, when I was analyzing countless charts, looking for recurring signals, and beating them into my brain. The learning process / "getting there", is brutal and will require a lot of hours and likely multiple years. Yet it's a mental challenge and will sharpen your mind. I never found it to be sleep inducing, or mind numbing. But that's just me.
Prior to leaving my profession to take up trading, I worked in a heavy analytical field for a decade. There were many days early in my career where I spent 10+ hours sitting at a desk and doing mind numbing work. Searching for needles in giant haystacks of data. I would often sneak away to the bathroom or my car, and take naps. If I did that at my desk, I would no doubt be reprimanded. As I climbed the ranks, my role switched to overseeing others. I hated this as well, managing the personalities and conflicts and work ethics amongst those below me, while simultaneously dealing with the bullshit from those above me. I was making a solid income and living very comfortably. Still, I dreaded Mondays, I hated the endless meetings, playing the office politics, and feigning enthusiasm for a job I truly despised. Here is a quote that has always resonated with me:
"If a man makes two-thirds of his existence subservient to one-third, for which admittedly he has no absolutely feverish zest, how can he hope to live fully and completely? He Cannot."
Your right. You are either busy building your dream or someone else's dream