You brought up R' Moshe and then discount him? I'm really confused.
Don't be.
I brought him up regarding halacha because he is the most important name (in my opinion) on halachic questions.
But it isn't just him...the majority of poskim concur.
Let's say we had a case where R' Moshe was in the minority. Take for example chalav stam.
The majority of poskim disagree with R' Moshe there, so I wouldn't keep stressing his view in such a conversation, despite his eminence.
Next.
Hashkafah. First off, you can't equate halacha which is more defined with hashkafah which is less so.
That said, there are many opinions (such as, the Lubavitcher Rebbe and R' Miller) that disagree. So hashkafically, R' Moshe was being cautious more so than others.