- Enormous stigma
- Being a powerless pawn of Kafkaesque bureaucracy
- Poor nutrition, distracting hunger, nagging uncured illness
- Pressure, stress, fear and suffering
- Low access to anything not in walking distance, or which costs money to get in
- Easy access to distracting pop culture and particularly TV
It's basically unsurprising that a person here and now who's unemployed DOESN'T behave like a person in a society that distributes Basic Income without stigma.
If you want to look at a group which might make a better comparison, look at retirees, or lottery winners.
Dropping back to ages 65-74 is mostly similar, except they only read half as much.
Also, many types of work are just not possible outside of a company context because you need infrastructure and, well, company. Some people may be willing to do a bit of today's work for free, just for socializing, if they have basic income and if it's socially acceptable to work without pay. Or maybe not. But it's hard to know, from just looking at this data.
If I have a basic income, I would love to go out and do something productive, take classes to benefit myself to get a better job. I have a few family members who doesn't have a job for a few years and they cannot take any free classes, they all cost money, especially the intensive technical courses.
I would love to go to the arts and stuff but the moment I step out as an unemployed person with no income, it will only incur expenses I can't afford. Rent, Bus fares, food, clothing and so on are vital expenses that I need to save for, I can't do that with no income. I've met people who can barely make any profit after paying their expenses.
You may very well be right that the relatively small group of people who like to do creative things in their free time would make a big impact, though.