7 or 8 wallets that are all open source but who has time to check the code and verify everything before installing all the new versions as they come out or just 1?
being open source is about being transparent not about every single user checking the code themselves. for example i have not really checked Electrum or bitcoin core source code (not extensively anyways) but i know that many others have and that is enough. but if it were a closed source wallet i know that nobody has ever seen the code or knows what it is doing.