Along with that it's a closed source wallet for years but still most people and even Google assumes its open sourced wallet that itself a red flag and probable cause for not using it. And anyway why someone needs web wallet when they can simply install non custodial wallet such as electrum for Android and blue wallet for IOS.
The problem with Google search results is that they also contain old information and articles about a service. Apparently some of the wallets start off as "open source" only for them to close their source code afterward. A good example is trust wallet. Back in the day, before they even got acquired by binance, there is talk that they were open source. So if a user just bases off Google search, they will easily be confused into thinking that the wallet is open source, yet it's not.