Looking at a monitor all day is not healthy no matter which brand it is. You’ll have dry eyes eventually and sleep problems too. Looking into the bright light all the time fries your brain and it forgets to put itself to sleep.
If you are doing lots of trades in a day, you better write your own trading algo and let it do the job. Otherwise you’ll lose what’s left of your current health soon.
We don't know yet if he is like that because he did not indicate his trading routine. I still don't think that there are traders or simply person like that who look at their monitors all day. There are only people who stare at their monitors for a long period of time because maybe this is where they work? Like me for example and luckily I have no sleep problems. In fact it makes me sleep easily when my eyes are already experiencing a fatigue. Traders are lucky that there are now trading bots that can do the job for them (like what you said there) but maybe some are not confident about it and also they feel bore if they won't do the action themselves.