When I had first come to crypto in early 2017 I participated in the ETH buzz along with other coin pumps. It was views such as yours, JJG's, and many others here that encouraged me to see them for what they were and eventually led me entirely away from the shitcoin buzz never to look back. Feeling rather lucky for that education today. Thanks a lot!
Glad I could help. I too at one point thought that having another coin/blockchain with a differing algo than Bitcoin's could be beneficial.
But then I started to realize that at it's core, all people fundamentally care about is a cryptocurrency's ability to be :
1. Secure and scalable
2. Open source, decentralized mining and voluntary core devs
2. Be scarce and deflationary
3. Store of Value
4. Permissionless transfer of value
5. Exchange for fiat (if necessary), high liquidity
6. Popular with merchants and exchanges
7. Buy goods and services with it
That's it. You can distill 99.99% of peoples wishes for a crypto into that simple, straightforward list. Any other usefulness beyond that list is inconsequential and wouldn't be missed in the world, at all. Anyone that says otherwise is being disingenuous and head-in-the-clouds.
So seen through that lense, is there any real NEED for any crypto other than Bitcoin?
The answer is a resounding "NO".