I know where you're coming from, but if the ROI is there, it doesn't matter if the first iteration is fragile. Just make sure your monitoring and support are rock solid. If the RPA stumbles, someone needs to know right away, and they need to be there to catch it. And it should never be designed in a way that it could cause critical issues in the meantime.

I would add, RPA isn't as fragile as its reputation sometimes suggests anyway. Sure, using it on a top-500 site is going to be a problem because of frequent UI changes. But we've successfully used it on systems in less "move fast and break things" industries that have been there twenty years, and they're going strong.