I'm vaguely sympathetic to that viewpoint, but also do think changing your environment matters. Humans are weird creatures, and not really made up of completely disembodied rational minds. Even simple things like choosing to read in one location versus another seem to make significant differences, so I can see not having internet at home making differences too (some positive, some negative).

I had no internet in my apt for a few months, and it was also right after I had moved to a new city (it was semi-accidental, due to bullshit with a "pre-wired for ethernet" apartment that I took way longer to give up on than I should have). The mixture of having no internet and not much else in the apt was interesting. It was easier to unwind at the end of the day; go home, cook, read a magazine or book, go to bed. There just wasn't enough in the house to keep me up.

It's true that when you have the internet, with all the information and possibilities, it's like I have both an entire library and an entire workshop always available to me. And how am I going to go to sleep in the middle of all that? But I think it was also important I didn't have much else in my apartment at the time; if I had had a bunch of dead-tree encyclopedias, novels, magazines, etc., I would've just read those.