Avira,
OK, I looked into it, and it definitely is problematic.
Nonetheless, Simcha was using him l’chumra. You’re saying his machmir stance of lifnei iver by heter mechira is invalid because he’s problematically meikel elsewhere? If anything, doesn’t it kind of drive the point home that someone who is all too willing to be carelessly meikel still concedes that the halacha is stringent in this type of case?