Wouldn't the same apply to https://www.indiehackers.com? Can't see this as a huge problem. At that stage the idea hasn't been validated yet so all the work is still there to do
This is more similar to me saying, I am I going to create a TikTok video where I do this cool dance and me ACTUALLY creating the TikTok video where I do a cool dance and it gets a million views. The first doesn't invite copycats so much while the second one does because the idea has been eternally validated and, in both the TikTok and software case, it looks easy to replicate.