If you think that deploying anything with Kubernetes is simple... well, I have bad news for you.
It's simple, until you hit a problem. And then it becomes a lot worse than if you had never touched it. You are now in the stage of a person who'd never made backups and never had a failure that required them to restore from backups, and you are wondering why would anyone do it. Adverse events are rare, and you may go like this for years, or, perhaps the rest of your life... unfortunately, your experience will not translate into a general advice.
But, again, you just might be in the camp where performance doesn't matter. Nor does uptime matter, nor does your data have very high value... and in that case it's OK to use tools that don't offer any of that, and save you some time. But, you cannot advise others based on that perspective. Or, at least, not w/o mentioning the downsides.
Everyone running databases in production knows how to take backups and restore from them. K8s or not, even using your cloud provider's database's built-in backups is hardly safe. One click of the "delete instance" button (or nowadays, an exciting fuck up in IaC code), and your backups are gone! Not to mention the usual cloud provider problems of "oops your credit card bounced" or "the algorithm decided we don't like your line of business". You have to have backups, they have to be "off site", and you have to try restoring them every few months. There is pretty much no platform that gives you that for free.
I am not sure what complexity Kubernetes adds in this situation. Anything Kubernetes can do to you, your cloud provider (or a poorly aimed fire extinguisher) can do to you. You have to be ready for a disaster no matter the platform.
It's simple, until you hit a problem. And then it becomes a lot worse than if you had never touched it. You are now in the stage of a person who'd never made backups and never had a failure that required them to restore from backups, and you are wondering why would anyone do it. Adverse events are rare, and you may go like this for years, or, perhaps the rest of your life... unfortunately, your experience will not translate into a general advice.
But, again, you just might be in the camp where performance doesn't matter. Nor does uptime matter, nor does your data have very high value... and in that case it's OK to use tools that don't offer any of that, and save you some time. But, you cannot advise others based on that perspective. Or, at least, not w/o mentioning the downsides.