No, really. I know of sevral people who can quote a psak from < intentionaly left blank >, and instead of using this knowledge to know what requires a shai’los chocom, will apply the psak they read to a practical situation. In some cases they are right, but more often than not, they are shoving an extreme chumrah down their family’s throat.
As far as having a rosh yeshiva, you can be affiliated with a great personage, but if you don’t ask for guidance, you’re bound to miss the mark. There is NO odom godol that would have what Moshe said. Even if he “heard” this in a drasha, he is adding 1 plus 2 and coming to the natural conclusion of 3. While this works in math, it does not work in Halacha / hashkofo, unless you’re a posik or moreh horoah (niether of which I would presume MR to be).
And while it is somewhat irksome, I actually enjoy his rants. It makes me appreciate how lucky I am to have been raised to understand the need to have a rov / rebbe / rosh yeshivah / mashgiach / madreicha (Maharat was intentionaly left out!)
No, its not alwasy easy to bend my will to the answers I get. But that’s the price I choose to pay. And by seeing how off base MR is, I see its worth every bit.