Even if you introduce bugs in your UI (which I think is not very likely if you have a basic understanding of your system), the chance that someone would exploit software that literally only runs on your own machine seems extremely unlikely to me.
Yeah, I could literally open up a port on my computer which executes everything sent to it. As a bespoke app, it's pretty unlikely that it would ever be exploited even though it's ridiculously dangerous.
To be at risk, you'd first need to publish your application. The attacker would separately have to figure out how to identify and access your computer for attack.
The old human nature tendency of "Just ship it!" and the desire to move on to the next shiny thing on our wishlist doesn't go away with AI. If it anything, it makes it worse.