This advice goes beyond content creation and into genuinely everything. People seem to take for granted that if they develop a skill, it both will, and should be, never supplanted, their success should never be allowed to regress. When in reality, trends and expectations shift. Some people like to claim this is a modern manifestation, but it really isn't - the speed of new things arriving changed perhaps, but history is replete of tales of people who learned a trade and failed once they were old and stubborn as the expectations tools and techniques of the trade changed.
Same goes for programmers who put their ass into learning stuff that's completely irrelevant today, languages and tools and such. Same goes for authors and artist who tried to make careers of fleeting trends in writing and media. Same goes for factory workers who took for granted that being smart enough to not put their hands in the crusher and diligent enough to not get drunk before work would mean a lifetime working whatever line, only for the gizmos they built to become irrelevant and the whole business chain to go out of business. Same for the office drones, accountants and finance people who found most of their work replaced by digital tools. Same for the executives and CEO's who learned to engage in styles of business that aren't relevant anymore, who started up companies who's services became irrelevant and therefor unsold. Every single layer of every single profession out there has the constant looming fact that the work you do will change, and if your not willing to adapt and compete on that leading edge, you will eventually be made irrelevant in the economy.
The best thing you can do is learn to learn, and never turn your nose up at trends and shifts in your industry. You don't need to be a complete [thing]bro and immediately try to make your life about every little shift, but always remain curious, open, and try things. If you hear about a new tool, technique, or piece of software in your field, spend a few hours checking it out and giving it a chance. Odds are it'll be a novelty or a nothingburger, but if it does turn out to be a major shift or trend, you won't be completely in the dark. AI's the one that a lotta people seem to be rejecting on ideological grounds, refusing to even touch it, even if they're in fields where it could be a big deal like programming or business documentation/analysis. Another one is additive manufacturing for engineering/industrial people - its easy to sleep on them as lol 3d printers, but they are starting to look extremely promising for a few applications.