First, you can shutdown completely. You can either issue a command line “shutdown /s now” or you can go uncheck the option “Turn On Fast Startup (Recommended)” It’s not a removal of a feature.
Second, this is a default option and Microsoft is choosing the one that works for most humans. You are demanding the thing that inconveniences the most people be the default. So it’d be like a colorblind person demanding that the colorblind mode that works for them be the default way because they are slightly inconvenienced by going to the settings.