I agree of course. Anyway, this is nice and healthy discussionsOpenSource doesn't mean that the tool is safe
It just mean that you can read the code - if you understand it. And also this doesn't mean that this code is realy used in the end. For that, a reproducable build is needed.
A lot of people nowadays are blended by "it's OpenSource it must be secure then" which is very dangerous. But well, this end in too much offtopic and i get your point as i use SimpleWall by myself yor a long time (sinve v1) and i love OpenSource generally.