I disagree. Many activities demand a certain amount of attention and interaction, unless you throw caution to the wind with afk passive activities in dangerous space. Discounting those, as far as actively managing PI, it is a very fast gig and requires a very small percentage of your attention. It can become so martial that the task nearly completes itself by rote and you can maintain full comprehension on a secondary audible input, like an audio book, the news, or some music.
Once the setups are complete, maintenance is such a low footprint of invested time. Even with the occasional relocation of a p0->p1 setup. This, after practice, takes less than 6 minutes per planet, breakdown to fully linked, routed and pulling. The frequency of relocating varies by resource and planet. You can go months without having to.
Exporting and importing p1->p2 factory planet takes like 30 seconds. 1 minute for multi output p1->p3 (two p3 products). This would be much shorter if i could undock faster. This almost every day.
The routine refill and exports takes about 45 minutes, half of that transit between planets. Could possibly be reduced with hyperspatials, but not by much. Nothing will do it faster than an Epithal. This maybe every 3-4 days.
Then you have moving things to sell. My alliance was able to purchase where I was operating. So no hauling and 1% tax.