These days, basically everyone needs a decent PC to get through life, but they come in so many shapes and sizes that it's important to know what you're trying to build before you even get started.
For instance, if you're just going to be using your PC to do daily office work – like web browsing or writing up documents – you don't need to drop thousands of dollars on a fancy gaming rig. Building a PC with something like the AMD Ryzen 5 5600G will get you a quick and responsive PC that will last you years, with enough graphics horsepower to get you through all tasks that most people experience on a day-to-day basis.
However, there are plenty of people that need something with a bit more oomph. Computers are legitimately more powerful now than they've ever been, and there's never been more options to build something that will tear through the best PC games like they were so much paper. But, powerful hardware like the Nvidia GeForce RTX 3080 and the AMD Ryzen 9 5900X come at a high price.
Luckily, if you're on more of a budget, you can get something like an Intel Core i5-11600K and an Nvidia GeForce RTX 3060 (if you can find one in stock at a decent price, that is), and have an incredible 1080p gaming machine. And, that will be able to get some video editing done on the side too.