To be fair, it is usually not just writing three emails. First you have to research the potential recipients, browsing job ads and the companies web site. You might even go so far as to taylor your CV towards the position.

Also, as you say, managing time efficiently at home is difficult. And they might just be tired of hearing yet another well meaning advice.

There might also be a factor of things taking more time if you don't have money. You have to go to the cheap supermarket that is far away rather than the expensive one around the corner. You have to go shopping and cook for yourself, rather than grabbing a quick lunch at your favorite Sushi joint. And so on.

But I don't really know - I actually offered to try to help some job seeker in my blog once, but nobody took me up on it. Of course my blog has no reach and I was also unsure of what I could really offer (except for computer skills, brushing up online representations and whatnot). I am actually very interested in that problem - figuring out ways to help job seekers could do a lot of good.

One thing I imagined was A/B testing for job application letters and CVs. If you are really sending out hundreds of applications, it might begin to make sense?