What’s the value of useless Amex Reward points other than Marriott or Taj?

What’s the value of Amex Rewards points for someone who don’t want to stay in Marriot and Taj hotels. Except these two Amex reward points seem useless to me. Can anyone please shed a light on better use case?

Post Edit: Adding the background, as some are offended. I recently started with HDFC Infinia and released the benefits of it. Then came to know my wife is using Amex from years and has tons of rewards point and never redeem them. Now to redeem them best value is either marriot or taj, but we don’t go there because they are too costly. So she is thinking seriously to close them and switch to infinia as it offers many options to convert rewards point with 1 to 1 value. There asked this question.