The extra functionality isn't opening security holes. It is central functionality that users have come to expect such as Auto-Type or support for YubiKeys. The Debian maintainer has decided to disable the WITH_XC_ALL flag, which disables ALL optional features (not sure why you consider this a lie).
Your claim that KeePassXC communicates with random webpages is also false. There are two cases in which websites are communicated with (none of them random): a) an optional update check (can be disabled), b) when you click the button to download a website's favicon. Please don't just state things that are not true.
Your claim that KeePassXC communicates with random webpages is also false. There are two cases in which websites are communicated with (none of them random): a) an optional update check (can be disabled), b) when you click the button to download a website's favicon. Please don't just state things that are not true.