I strongly agree with the spirit of what you're saying, but:
> making grandiose claims is not doing science. Making novel falsifiable concrete predictions is science
It seems to me that making grandiose claims is absolutely essential to science every now and then. A good example is when Einstein made the grandiose (and unfalsifiable) claim that the mathematical theory of relativity already worked out by Lorentz and Poincare and whoever was best seen as the denial of the existence of simultaneity etc., a claim which obviously turned out to be very fruitful since it lead to General Relativity.
However (and this is one reason I so strongly argee with the spirit of what you're saying), (a) there isn't room for very much of this stuff, (b) Einstein was much better at it than Wolfram is, and (c) Einstein was listened to because at the same time (ha ha) as he was making grandiose claims he was making unarguably gobsmacking breakthroughs in atomic theory and quantum mechanics.