The point is to make money!

You see what they call inscriptions and the advertisers of this scam method like to call it "token" or NFT is neither one of those in reality. It is arbitrary data, a junk that is injected into the chain by exploiting the Bitcoin protocol.
The only reason why these scammers insist on using bitcoin blockchain for it is to be able to hype up a dead concept (ICO) by associating it with the name Bitcoin and get some newbie victims who don't know any better to buy that fake garbage in a fake market so that they can make money!

As we know these scammers have been desperately changing the name of their scam every now and then to renew their victim pool:

Otherwise if they truly wanted to create tokens there are countless ways of doing it from using bitcoin side chains such as RootStock to actual token creation platforms such as Ethereum.