I don't believe she's talking about gentrification as a good thing, just using it as a metric. For example, on a lower income, I wouldn't choose to look in a highly gentrified area for housing, because rent prices may be unaffordable and come with a lot of amenities I don't need. Food/restaurant prices may also be unaffordable. Personally, I have chosen to live in more and less gentrified areas based on how much money I was able to/comfortable spending on rent. At an extreme end of the spectrum, most of us may not live in Beverly Hills, CA, or own a condo in midtown Manhattan, and it's informative to say those areas are extremely gentrified and un-affordable.

There are more discussions about income inequality, capitalism in the housing market, unfair housing practices, etc, that the author wasn't trying to comment on when she was broadcasting information.

Imo, the challenge is that it may be assumed that you have bad intent. And also imo, I don't expect this challenge to go away, or be "fixed" (if it is a problem at all). The power to have your words be broadcast to millions in an instant is also the challenge of having millions of reactions to your words.