The premise of this question is dead wrong.
They’re often unrelatable because most other types, especially sensors, wilfully ignore an INTP’s needs.
An average INTP is by far, more capable than all others who deem them incapable.
INTPs are often the ones who seem to fumble about and blunder often because unlike extroverts and sensors; they’re using an exponential amount of energy to maintain their imaginative constructs in their headspaces.
Often, the only other type that understands this is the INTJ because they also have this grave tendency.
The sheer amount of brainpower and concentration it takes just to fuel their form of thinking is something not any other MBTI type can handle.
It has nothing to do with their capability that makes an INTP seem helpless; it is because their effort and directed energy is something that isn’t often seen.
INTPs are also often not unrelatable — they just don’t often bother to tap inside their feelings until much needed.
Only more understanding types that touch into this in a very interpersonal way can bring out an INTP’s feelings.
Which an INTP is actually rather simple in thoughts and feelings underneath all the clutter of sophistication and complexity.
A childlike innocence gleams from within.
That is primarily where their curiosity blooms from.
INTPs aren’t the most helpless types; they’re the most capable.
They’re also not as unrelatable as most people think.
They’re the most beautiful minds you’ll ever meet.
And they’re darn right one of the important figures that makes everything around you even possible.
Most MBTI types make the world go round.
But the INTP is one of those who spearhead everything we see today