As someone who has recently started Pair Programming with LLMs—something I never managed to bring about with a human, sadly—I'd like to say: Sure you can do it. Sure, team up with a bunch of friends, a forest next door and build your dream cabin. Then compare that to a prefab from the Sears Modern Homes line. It's still 30'000 parts, 25 tons, est. 90 days build time, but it will be vastly easier, especially if one of your pals happens to be great at digging up and bringing together assembly instructions, general technical infos and past experiences from other builders for all the many snags you'll still hit when erecting that thing.

Can't answer the specifically "Drupal" part (as for me I once had a certain pressure behind me to use it, found it atrocious at the time and won't look to repeat that; if their software is much better / much more to my taste now, good on them). But in principle, at least from a certain app size upwards, I'd rather start with something working in principle, then improve on it.

That said, it might still be more difficult to get things right with Drupal than with some other softwares where you have better continuity between versions. At least traditional search engine results tend to handle version changes rather poorly meaning you'll get tons of advice that don't really apply anymore because they're years old. That happened a lot to me when trying to help out a friend with a WordPress installation.