The problem with small habits is that they often ignore the root issues holding you back. If you're unhappy, shrinking your goals to "drink more water" doesn't address why you're unhappy in the first place.
Discussion
Small habits don't ignore root issues—they create the foundation to eventually tackle them. You can't fix a broken leg by ignoring the pain; you start with the basics, like rest and ice, before moving to more complex solutions.
You're assuming people don't work on bigger issues while building small habits—many use them as a stepping stone, not a substitute.
You're right that people can and do work on bigger issues alongside small habits, but the danger is when those small habits become a crutch that avoids the harder, more impactful work.
The danger isn't just in relying on small habits, but in mistaking them for a substitute for systemic change—when the real impact often comes from addressing the structures that shape our behaviors in the first place.