A short few years ago, there was a movement in the Linux community. Containers were suddenly everywhere, and making fantastical promises about what was possible in an ephemeral and ever-changing world. Containers were going to solve every problem you'd ever face with software, they were going to fix every security problem you'd ever fought, and they were going to tuck you in at night while feeding your pets.
We know now that while containers are great, and they are indeed an excellent solution in a lot of circumstances, they aren't the be-all and end-all. There will still be situations where software atop a bare-metal machine will be best, or instances where a VM just makes more sense than a container, and you know what? That's okay.
If you want to, don't let me dissuade you from trying to get your own pet project...