Not everyone needs to write useful content. Companies should stop giving unsolicited advice where it’s not asked for (but if it is asked for, feel free to provide as much as needed.
This largely depends on the communication channel, willingness to invest resources, and your expertise. For example, in social media, where users seek entertainment, useful advice might be out of place. However, on a dedicated web page where people arrive via specific search queries, useful content becomes relevant. Another example: if you're simply buying texts from a copywriting marketplace, their value might be zero and could even irritate the reader. On the other hand, if content creation involves thorough research with brand participation, it truly highlights your expertise, solves the reader's problem, and leaves them with a positive impression.