This is valid statement. But I assume that will get much better over time, as computers are getting more energy efficient, which could change a lot en masse. Delivery of disks is harder to optimise, as you cannot just teleport them as easily.
It is like litter.
Paper ads are somewhat limited due to consumer complaining about having their mailboxes filled with them and someone has to go there and put it in and can't avoid a homeowner guarding the mailbox if they would force the issue.
Using e.g. uBlock Origin might be the most impact for no effort environmentally friendly thing you could possibly do.
In regards to Netflix I suspect there's a streaming bandwidth plateau we will hit (if we have not already): there are only so many hours per day people can watch content, population growth isn't that strong (and can't increase forever), and video resolution then becomes the driver of increased data use (and that probably can't increase forever either).