Hi jet, welcome to Sitepoint
I agree with you, the "infographic" that stomme posted is a bad example,
I have seen some really well made ones that look beautiful and show the data. They are very effective and I like things that look good, who doesn't?
http://www.edwardtufte.com/tufte/books_vdqi is a masterpiece on making good honest charts.
As long as the data is shown accurately and not with gimmicks infographics have a lot of great uses.
However, the problem is that they are invisible to those who are vision impaired or otherwise unable to see graphics.
This really is a small number, and it's not as if people who add infographics are excluding visually impaired users, it's that visually impaired users cannot see visual content (charts). It's unfortunate but it's not neglectful to include content that benefits the vast majority.
The thing about images is that they don't always load
This really isn't a good reason not to use infographics.
I am a little weary of marketing agencies ability to deceive though.
If only the really great products / content out there were the ones with great marketers.