Who allowed it? Please don't misunderstand, clone tokens won't be agreed upon by the team members of the real project. If scammers use the same names for certain tokens, they use it to attract people to buy. Moreover, the names of top tokens, people sometimes just buy the tokens without any research because they are already trustable.
Hi buddy, I meant the dex system allowed it [you can create a token with any name in less than 10 minutes in Ethereum remix, easily, and low cost]. Yep, we have to make good research so that we can avoid buying fake tokens because many scams are just copying and pasting solidity code for any good token and they benefit from it while traders are crying.