I guess I just feel like your rebuttal would be stronger if its only points weren't the same, yet ultimately irrelevant in the case of a prior technology with many similarities.

Of course they're not the same thing. That doesn't mean it's now totally valid to claim that it won't be successful due to the same roadblocks that the Internet overcame easily.

Do you have any arguments against cryptocurrencies that don't mirror early problems the Internet had, that people warned about, but ended up being very solvable? I think that'd be a lot more convincing.