The first thing that you have to understand is that consoles have better graphics than the average computer. The graphics go into detail like how shadows are rendered and how lighting effects are handled. You can't get this kind of detail with your computer unless you spend top dollar on top of that.
The second thing you need to know is that even though you may be able to run certain games at 60fps on your computer, those kinds of games are rarely smooth enough for most people. Most people will notice choppy movements, laggy controls and constant hiccups in their gameplay if they try anything more than 30fps. This would make it difficult for them to enjoy playing their favorite games even if they do have high-end computers or gaming laptops (which many do). The games I can play on my PC are limited. When that happens, I resort to playing on my Xbox.
The third thing you need to know is that in order to get 60fps on your computer, you'll need an extremely powerful graphics card. Most people don't have a graphics card powerful enough for this kind of performance unless they're willing to spend top dollar on top of their current computer's price tag.
The fourth and final thing you need to know is that if you want to play games on a computer, you might as well just buy a console. They aren't any more expensive than most gaming PCs and they can run much better games without all the hassles involved with setting up a PC. So if you want to play games on a computer, go ahead. But don't expect to get 60fps unless you're willing to spend lots of money on a high-end PC.
I hope this helped! If you have any other questions about the difference between a console and a computer, feel free to leave them in the comments below.
As always, thanks for reading and happy gaming!