With "Chevron" Congress gave broad mandates but put the responsibility to determine and enforce individual regulations on those experts who understand the intricate, detailed minutiae of the things they regulate. Expecting congress to legislate on every single, pedantic, arcane instance is a recipe for doing nothing. Which is, of course, what they want. Congress is unable to that, so nothing will be done. The agencies are neutered, regulations are gone, they can get away with anything they want with impunity. Self-regulation does not work.
It's not just self-regulation.
The internet was invented in 1983. It was regulated under a Telecommunications Act passed by Congress in 1934.
It wasn't until 1995, 12 years later, that Congress got around to updating the Telecommunications Act to officially add the internet to the scope of what FCC regulates. Why? Because Congress was on a tangent about pornography on the internet which is why the 1995 Act contains an entire section called the "Communications Decency Act". If not for the porn obsession, Congress would have likely just let the 1934 Act suffice.
The next time that you're in a doctor's office or hospital, notice that you'll see fax machines in most offices. Why? Because in 1996, Congress wrote a law about healthcare privacy. Faxes are considered secure communications, where unencrypted email is not. Because Congress was too specific in the 1996 legislation, healthcare providers have been stuck using obsolete technology from 1996.
This is the biggest problem with having Congress write overly specific legislation: Congress is terrible at updating legislation to accommodate change. That's why it is much better for Congress to write broad, general laws and the empower experts and regulators to write the specific rules to accommodate progress in those industries.
Overturning Chevron is an open door for Project 2025 to come in and decimate government agencies and departments, because now, the Supreme Court made them ineffective. Sieg Heil.
It's been a conservative wet dream to "deconstruct the Administrative State". The Koch interests have poured hundreds of millions of dollars into this effort.
Americans are absolutely clueless about what their government actually does. They have no idea that before the government put in regulations, children used to die from drinking contaminated milk (not only was pasteurization not required, but bottlers would often put formaldehyde into milk to slow the spoiling process). Before regulators were enabled in the FDA, anyone could put something in a bottle and call it "medicine"; which is why Coca-Cola has the word "coca" in it... as in cocaine.
Before 1918, every city in the United States had a different time. There was often a clock in the town square or the railroad man for the train depot had a watch that determined "the time" in that location. Time was random and clocks might be set based upon an approximation of the position of the sun at noon. When you got on a train in New York, you had no idea what time you would arrive at your destination because there was no guarantee that "the time" in your destination was accurate. There are now two government agencies (one civilian, one military) who are responsible for telling Americans what time it is. Your computer and your phone depend upon the government to tell them what time it is; many devices don't keep accurate time and periodically resynchronize to the government's clocks.
Conservatives love to whine about regulations that they don't like and those regulations are an infinitesimal amount of what the government does. A significant portion of the economy and the stability of that economy is dependent upon those government regulations.