Agree. Also as a PM, one of the most important things you can do, once you've decided or understood "this is the most important thing we can be working on," is to sell that vision internally so you have high alignment and thus can move fast with shipping (i.e. Sales, Marketing, Legal et al are all on board and ready to help you get to market).

SHOWING internal folks something is always more compelling than words on a slide. So if you have good alignment with your Engineering team that the thing is possible, you can go off on your own and vibe-code something to garner internal alignment... and then throw it away and let your Engineers build the real thing. And they won't have to spend extra time on a PoC that's only meant to show off internally.