I agree with you but some people seem to be missing the disadvantage of open-source wallets and somehow believe once it is open-source it is good to go.
The striking example is the open source
Linux utility that had for many, many years backdoor which made vulnerable encrypted SSH connections. Interesting that it is believed that no body in the world was suffered from this backdoor because of "bad actor sloppiness" otherwise "it would have been catastrophic for Linux users
me including.
l