I disagree a smart contract language is without value to business - but I agree it's speculative and unclear at the moment. The best we can do is look at cloud platform and programming language maturation/adoption to get a feel for what a decentralized app platform will take in time and engineering effort.
The idea being we're a few years at least before language and infrastructure can be mature enough to have value for most users beyond earliest of adopters. The other languages you've mentioned are much further along than any "dApp" platform at what they do. Decentralized application platforms like Ethereum are a new space with new requirements but, as far as I can tell, necessitate a new language to satisfy unique requirements. The hot-take is that Solidity is probably going to take some big changes to make it much further. I've not been impressed with it.