Good advisors could actually be of help if they are consulted. Sadly, in most cases the core team just try to thrive of the influences of advisors, instead of seeking to learn from them. People get interested when they see some big names as advisors, but that shouldn't be the primary reason of getting advisors.
Even in real life you don't see that many public listed projects really put their advisors to good use. But there you have it. Having a good advisor that actually consults than a big name guy with no real technical expertise is 10x better for your project... but gains you nothing in terms of interest from investments. That's the sad reality.