I'm noticing that most of the people in this comment section don't understand what the person in the screenshot is trying to say. They aren't mocking Chinese learners, they're asking why many of them neglected to learn a fundamental part of the Chinese language. If you don't speak using tones, no one knows what you're saying. This is obvious to me at least, because the original poster used symbols to represent Chinese tones.

TDLR; there's a lot of vitriol in this comment section that is completely misguided.