This, to me, is the biggest advantage of kubernetes. Yes, you can do all the things yourself, with your own custom solution that does everything you need to do just as well as kubernetes.

What kubernetes gives you is a shared way of doing things. By using a common method, you can easily integrate different services together, as well as onboard new hires easily.

Using something ubiquitous like kubernetes helps both your code onboarding and your people onboarding.