Indeed there is a small sect that say that are all alt-coins are scams, but those guys usually are no clue what alt coins really are and think they are just Bitcoin rip-off currencies, when in reality a large majority of them do have some unique features. And of course, there are the tokens, which should not be compared to coins, as those usually are specific for a platform and do have a reason to exist.
Platforms like ETH and NEO allowed to foster an ecosystem completely impossible to imagine on something like Bitcoin.
Of course, we can also say that there lots of scams in the market, and that's true, thats why doing proper investigation not only about usage of a coin but also the team, roadmap etc is extremely important