Bitcoin Core should host in bitcoincore.org or something, a blockchain file that gets updated frequently so new people aren't alienated to never use Bitcoin Core since downloading the blockchain from scratch is hell.
But if there was a way to download the blockchain from torrent at really fast speed, it wouldn't be so annoying. With the improvements in booting up times with faster validation like secp256k1 it wouldn't take that long to validate it compared to download + validate at the same time. Im sure there is a way to make it guaranteed to be the real blockchain due some hash checksum or something (to guarantee is not some fake blockchain).
Im just saying this cause I see all the newbs that download Bitcoin Core giving up and using blockchain.info or something.
Downloading the blockchain (even with fast torrent), and then trying to synchronize afterwards it is usually SLOWER than just synchronizing directly from fast peers on the Bitcoin network in the first place. So, offering such a download would just annoy new users even more.
Bitcoin is an open source decentralized system. There is no entity "in charge" of bitcoin. Therefore, any blockchain that anybody else offers would be just as "official" or "trustworthy" as a blockchain offered by you. If you think it's such a great idea, then you should do it (or hire someone to do it for you). If you aren't willing to do it, then perhasp nobody else is doing it either for the same reasons that have.