It's important to understand why stuff fails. That's the only way to stop things from failing in the future and make sure people are on the right path to not failing. If a large number project failures are management failures, it's useful to know that. Otherwise you try to fix everything except the management structure.
"Personalization" is in a similar place for digital publishing; everyone wants it, products and services carry big price tags, and few organizations want to invest in foundational work or simple, iterative improvements. So they swing for the stars with unrealistic goals like "micro-targeted messaging perfectly tailored to every visitor, no matter where they are in the customer journey" and the results are predictable…
I take the increasingly grim accounts of project failure rates from analyst firms as a good sign — they can be used to sober up executives with unrealistic dreams.