i think there are a couple of things that you are confusing with each other here.
- those idiots who call themselves “company” and run an ICO to scam people and take their money.
this obviously improves nothing except the scammers financial situation!
- real companies that talk about the blockchain technology
they will create centralized blockchains which also improves nothing
- altcoins that are being created left and right
these can improve things but it rarely happens because similar to ICOs these are also mostly shitcoins and scams to fill their own pockets.