Pay attention to people who jump on bandwagons they rarely know what they are talking about and only drive prices up with false hype. And what you may call bad advice. I would call giving helpful advice. Or anything other than yep it's f@cked. Tear it down and build it up again. When you don't know that for sure. You have no clue really.
You need to work on your reading comprehension (he said the plugs are corroded) and while you are at it your punctuation.
If he wanted to risk blowing his poop to pieces he wouldn't have posted the question. Nobody said rebuild the thing, rather to open it up and take a look at what he's dealing with. If it's got rust inside he could easily rebuild it for $250-$300 or so if he's capable of doing it himself. Running until it lets go, which it will if there is rust, is going to come in at $600 for used stock or $1725 for another JM/Blue 718.