when you have a strong 1H, you end up with a lot of other house topics tying into the house of yourself, creating a kind of interference on your own understanding of who you are. you may have a larger than life personality but still struggle to know who you truly are

you end up internalizing and embodying a lot of external, not-self things that can muddy your own knowing, and you can become fixated on unpacking them all and trying to find a certain answer to the question of "who am i?" (i don't think there is one)

especially if your ascendant ruler is in a dark house (2, 6, 8, or 12), it's tempting and often easier to look to all the planets in the 1H and the houses they rule to make sense of the self instead of trusting that you already know all you need, that you're already living you