Those are certainly valid points. But do I want to care about that? Honest question... Discord also doesn't care about my privacy. Or making the internet a better place. So I think -in turn- I feel quite alright to ignore whatever client they like me to use.
What's with the "taxing for large and active Discord servers"? Does it lead to issues if I'm not using their Electron app or website? I can't imagine where this additional strain on their servers would come from?! I run my own homeserver, by the way. So I shouldn't weigh down on anyone else's server...