Why not? A significant portion of my web browsing is done on people's personal websites, since they often have cool things to share. If I'm going to get better performance on these websites, I might change my browsing preferences to favor these even more heavily.
So your web traffic might be to personal websites (mine is, too) - but we're a minority I guess.
So while the goal is laudable, even a 100% change would probably be a result of 20-30% of the web, I guess even less.
But then that would be an improved situation for the two of you, right? (And many others like you, including me.) So it would still make some difference to those who care.
The overall load on the web would still be higher than it could be, though, due to the bloat.
Small improvements should not necessarily be neglected or dismissed, though. Otherwise it becomes like a symptom of the original problem being discussed.
Everything is 'every little bit helps' and it shouldn't make you listen to the naysayers (e.g yours truly) - I'm just a little disappointed because I think it will not make a big difference. At least my conscience is clear ;)