you can, but you also un-invent the internet, and television.
I wish less people thought that if enough people will repeat something entirely illogical it is proven.
Granted- but if you add salt to your f/w aquarium your fish will be healthier. That, and poo-eating fish are available at your lfs so you no longer have to do water changes.
I wish I could reinvent television and the internet but keep cellphones uninvented... and maybe uninvent the computer whilst I'm at it.