CS: ““and its good enough for (some of) my mashpiim, even if it doesn’t have an actual source in a sicha, and it works, then it’s good enough for me too and I couldn’t be happier.””
Yes, that is hugely different. However, it is still problematic especially in lubavich where for the past 50 years everything has been, “The rebbe didn’t say it and no one else can make up their own views.” Who gave whichever mashpi’im the right to say that this type of (at the very least) questionable divination via the Igros is ok?
Btw, more in a comment to other lubavichers in the forum than to you, I find the claim that most lubavichers don’t believe in using Igros in that way strange. While I cannot claim that even most of the lubavichers that I know use the Igros, I have never before heard any lubavicher say that it is wrong.