If you want to win competitions, just buy the best plastic kit on the market and don't f**k it up.
Adding detail hugely increases the chances of showing slight misalignment, excess glue etc. You don't do that to win competitions unless you really know what you're doing. Proper judges can't find fault in what isn't there. Maybe your judges just aren't very good and lack objectivity - but that's not what I've seen. The more PE and rigging on a model the more certain it is that you'll find something askew or buckled if you look for it.
I totally reject the notion that more ambitious modellers build to impress others, as if the more mediocre efforts must inherently be more authentic in the motives. Investing the effort to detail a ship model is absolutely the sign of someone who wants to challenge themselves and be the best modeller they can be.
Don't measure other peoples' wheat by your bushels. You haven't a clue what motivates them. What they do may or may not be in the public domain but why they do it is entirely their own business.