I agree- he's helped a lot of people. In one of his books, he told of a couple who REALLY wanted to meet with him ASAP because they were in a big financial mess and wanted his help. He suggested a date the following week, but they couldn't make it- were leaving on a cruise.
For that audience, keeping them away from credit cards is a very good idea. Using Nerdwallet's average of $15,654 balance for households carrying a balance, even at 18% that's $200/month in interest alone.
I can ignore his advice about credit cards- haven't paid a dime of finance charges in decades, and $200/month is about what I receive in cash-back rebates. I'm also not enthusiastic about generating income through real estate investment, even though it's worked very well for some people. I still think Ramsey has some good points.