As far as I know, Google relies on popularity, brand...while top companies are spending a lot of money to promote their brands. So, it's no surprise those search results.
Google doesn't tell you anything of their own, they only tell you what the brands you are researching about is saying about their own products. If coinbase describe their wallets as the best, that is what google is going to show you since coinbase is a trusted brand. I have seen scams getting good review from google without them knowing that what they are talking about is a scam. The research on Google is now being over taken by AI and AI do not generate anything of their own but only gives you what it consider the best answer from all the information that is already on the internet. If we want to get genuine results from the question we ask, we have to trust platforms like Bitcointalk and not Google.