They could do a lot of things, if they cared.

For example: limit app and account renames; when creating/renaming app/account, compute levenshtein distance to all the existing ones and if distance < threshold, make it subject to manual review and make it unlisted before cleared.

Problem is, from my observation, that Google has a culture of hating any manual processes, because they do not scale, so they avoid them, unless compelled by law.

2nd problem is that they have big enough market share that they don't have to care about things that are not convenient to them. Slightly off-topic but in a similar way, Apple can increase iphone price 10% per year and get away with it, because people still buy.