I wouldn't call what you stated here as advice given because every one of us that is doing something differently, doesn't mean such things are been fruitful to us. There are things one could engage in and it won't be that fruitful to them no matter how long they try. You don't advise such a person to stick with that for long without having some other things they can highly think of to do. Remember, in today's economy, having a single source of income is not advice. Having a diverse side hustle is encouraged. The advice should be to try hard to be consistent in them all because you don't know the exact one that will later pay off in the future
Same goes for doing a common thing. Sometimes it is actually better to do things that are out of the norm. There are just down times in life and then not all that we start to venture will get us the result that we want. It can also give us some test first before we achieve the success, so we just keep on moving. If one doesn't work, then try again on the other, though I think there might be some who are destined to be doomed and fail forever but at least they are still alive and maybe they can still find happiness on other simple things instead. We can seek advice but we can also experiment and add more to it, especially if it doesn't work well.
Sometimes really get out of our comfort zone might do good things for us, and basically that is life. I mean we shouldn't be just living comfortably without venturing on others. We should try different things and see how it goes for us. Who knows, maybe those things that we really don't like will improved our finances for the better.
Just like in crypto, 7 years ago I didn't know about it although I heard from reading on the internet. So one day I just decided to join this community and learn about it. So fast moving, it made my life better. But we need to diversify so I invest on other things as well and maybe another one in the future. A least to make our lives easy, we should have multiple sources of income.