Not only do I run a small business, but it's a business in the sphere of saving people money. Granted it's not in the US but rather in EU.
Like others have said, it's not worth it, not the time nor the effort, for the miniscule amounts you would save if any for the attempted write off, if anything you will end up in the red time/money wise attempting to do it.
There are plenty of loopholes in tax laws everywhere, the question is not whether they exist, but whether they are economically viable for the size of your business vs. the savings possible, while also remaining legal on paper if/when somebody decides to check.
The reason there are so many streamers/youtubers that don't have much of an audience is very very simple, it's an easy and very tempting business to get into and start doing, and very very hard to actually break out and make anything sizable and long term out of; ratio wise compared to the numbers attempting it; so the vast majority of those attempting it remain at a minimal level and eventually fail/die off, but there will always be a mass of those attempting to get started regardless. It is essentially the struggling actor/actress Holywood syndrome of this digital generation.