There is cognitive overhead in even having to consider how Oracle could be licensing anything you download from them. Their licensing has a long history of being complex, expensive, and enforced. Choosing to get software from a less complicated (licensing wise) provider is a valid choice.

The licensing risk of using open source software, that is mostly being written by Oracle, from Amazon is less.

Amazon's open source reputation is that they'll screw over maintainers with their rebranded forks, but not go after users of open source.