I agree; mostly, but your last sentence misses an important point; It drives away people that aren't interested in open source projects with creators/maintainers that show this level of arrogance/attitude. The fact that it's Electron, would drive away people that aren't interested in Electron.

I've had experience both in work and my personal life with a wide variety of open source project maintainers/creators, some have been amazing, and their attitude encourages you to contribute, others have been so horrible you don't want to have to think about it again.

For me, personally, I have no problem with what this person is saying, it's how they're saying it that means I'll never touch this project, because I've formed an opinion on the kind of response I'm likely to get if I was to raise an issue.