The Tenth Amendment is pretty clear: "The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people."
Now, I know, the Supreme Court has effectively gutted the Tenth Amendment, but the intent was that the Federal government was restricted to a specific set of activities, rather than allowed to do everything everyone thought was a good idea.
So if you think that the intent matters, then you see much of what the Federal government does as being a power grab of things that it never should have had the power to do - and which it still does not have the legitimate authority to do.
Telecommunication has really changed the way the world works with respect to all of this, and made us care much more about the federal government than the state governments that are, on paper, supposed to be much more powerful.
As it is, we de facto ignore the parts that would screw up operating a modern nation-state, the "must preserve the independence of states!" wing gets to not-vote for amendments that de jure reduce said independence in order to let things actually work well/sanely, and no-one has to live through a crisis bad enough to get that wing to abandon their position. So... win/win if you're happy with a local maximum, I guess?
But the OS is software. And the users collectively pay the contractors who write the software, and they can change it to say anything they want it to say, because the users are paying for it, and using it. Unlike religion, the design is not literally written in stone. The designers were well educated on the history of OS design, and knew that designs change over time. So their design allows for modifications without a total rewrite - something they saw as a feature.
So it seems to me the arguments and proclamations made by some users that "It's not in the design!!!" are equivalent to those made by, say, systemd opponents. There's a lot of people (myself included) that do not want systemd in their OS. But if all the other users vote and want systemd in the OS, I will capitulate and learn to deal with it.
We shouldn't get so caught up in the damn kernel or OS that we stop improving the whole system.
The Constitution is not an OS, or even a kernel - it is an access control policy. What the government actually does is implement that ACL. So when people invoke the constitution all the time, it's like saying "They're trying to download 10 gigabytes of data, but the ACLs!!!!!", when the ACLs don't have anything to do with disk quota. So this is my point: people keep bringing up the Constitution when it does not apply.
It's the foundational document of the most powerful, prosperous nation in the history of the species. Things like that attract allegiance. It would be strange if it didn't.
"It seems like some people believe all new laws shouldn't exist if they're not in the Constitution."
Your "some people" straw man is likely fictional, or at least very rare. Laws that conflict with the constitution can be struct down via Judicial Review. Otherwise new laws are entirely compatible with the constitution. The US and its various states have no difficulty producing reams of new laws that survive the constitution just fine.