That article is about UV light, not bleach?
Most people's key takeaway from this is that highly-influential public figures with no scientific background probably shouldn't start inarticulately positing their own ideas for cures in public health briefings, not that the real problem is the media just didn't acknowledge he was talking about injecting (or "maybe not injecting") a different type of disinfectant...
Trump, incidentally, announced shortly after his biggest fans had mined the internet for evidence of Trump's awareness of cutting-edge research that his comments were actually "sarcasm", which would of course have been worse still.