Your reply is (respectfully) analog to : "Why do I care about this ssh security thing? I have always used telnet and it works fine."
In X11, there is the underlying expection is, that no program will misbehave evilly - and THAT has changed in Wayland and hence a lot of wayland is much more complicated and (some of it) unfinished.
A lot of "traffic copping" added, ensuring that the user is queried before privileged access is granted, the ability to capture raw video output of a window for example (through desktop portals) - or the ability to capture raw key strokes from another process windows (think password prompt).
I have been running Sway (on wayland obviously) for 18 months with almost zero issues.
In X11, there is the underlying expection is, that no program will misbehave evilly - and THAT has changed in Wayland and hence a lot of wayland is much more complicated and (some of it) unfinished.
A lot of "traffic copping" added, ensuring that the user is queried before privileged access is granted, the ability to capture raw video output of a window for example (through desktop portals) - or the ability to capture raw key strokes from another process windows (think password prompt).
I have been running Sway (on wayland obviously) for 18 months with almost zero issues.