@jussipekonen I hear you. I read all these "productivity" posts about having Hazel look for this and Alfred do the other while the person concerned just sits there and I think "Do I really want to set that up?"
A classic, for me, is changing the filenames of things like bank statements and invoices. They're all basically meaningless, and I have a simple enough system, but I always end up doing it by hand because it is literally only a few minutes a month. I can spare that time.