What happens when you just open the Visual Studio? It displays a solution selector where you pick up one of latests solutions. This is the default behavior. This can be changed, if you go to Options and then go to Environment/Startup page, you can change this to just show an empty environment.
People got used to it, also, it's mentioned in the documentation
The only problem is that the Environment/Startup is not there in Visual Studio 2022.
Instead, it's been moved to Environment/General, unfortunately, it's at the very bottom of the page and can easily be missed because you need to actually scroll down the page to see it