Because the constitution is the document that lays out the foundation for all of our legal rights and the limitations placed on the government that are intended to keep it accountable to the people. It's not perfect, but it does cover a hell of a lot, even more gets expanded on through legislation and the courts, and when necessary it can be (and has been) amended.
But it's also just ink and parchment. It can't do anything if the government decides to ignore it. It's the people who give power to the constitution. The more it is valued by the people across the country, throughout the political spectrum, both inside and outside the halls of power, the more likely it will be that those protections are respected. And when those protections are violated, people are far more likely to push back. And many within the government are also more likely to push back. That's literally the only reason we didn't have an overturned election, because numerous people at all levels of government said no, many despite being aligned with the assholes that were trying to stay in power.
So yes, I would very much prefer it if everyone would treat the constitution with some reverence if that's what it takes. The alternative is not pretty.