Keep in mind, all the functionality you need is in the teasers module. You can almost consider it an advantage that it isn't in core. Core has to be rock stable and you're not going to change it easily. Non-core modules can experiment and grow more easily, changing direction isn't a big group decision, unlike core modules.

Having a minimal core and letting you choose your options gives tons of advantages. The smaller your code base, the faster and more secure a system will be. You can choose between small modules that are cooperative tools, letting the ecosystem grow quickly and in unexpected directions.

Yes, it can be frustrating at the beginning to have to download and install a bunch of modules. Try installing WYSIWYG editors :) Think of all the little modules as contant experiments that help guide the core direction. Once you are used to it, you'll see its a great solution.