It is indeed intentional that Jagex Accounts require multi-factor authentication, as that is part of what makes them more secure than RuneScape accounts. There are many other security benefits to them too.
However, the Jagex Launcher remembers your Jagex Account credentials - unless you are using a shared PC (such as a family PC) you can leave the Jagex Launcher logged in and it shouldn't ask for your information each time - meaning you shouldn't need a code from your email each time you wish to play. When you restart your PC you can open the launcher and it will automatically log you in so you just have to click 'Play' on the game you wish to play.
20-Nov-2023 00:51:07