That was paraphrasing, rather than quoting.

The post being replied to essentially said “I don't use the features that have been regularly broken in recent times, or where the features I do use [core git] were broken it luckily didn't affect me, so anyone thinking of leaving has a mental problem”.

Or to paraphrase the old joke:

Q: How many programmers does it take to change a lightbulb?

A: The sunlight through the windows here is working fine, if you can't see where you are that must be a “you” problem.

"Writing software doesn't require GitHub". Well, if they do not need whatever is specific to github and claim that someone who sorely lacks these features has a mental problem...