The Premier League has 38 matches, so there's no need to overstate the fearsome Liverpool squad. I mean no matter how consistent Liverpool are they'll inevitably have their weakest. As a Liverpool supporter, I remain rational and understand that anything can happen, no matter how strong your squad is. Even in the Premier League we often see the strongest teams lose to underdogs.
I am surprised this is coming from an LFC fan. Anyway, what you said easier is nothing but the truth. In the eye of football fans, the current Liverpool squad look tough and bring Isak they may look invincible. But that is not how it works in reality. Even the toughest club lose to underdogs in some cases and it can happen again. If we also, look at their club friendly match against Milan, you will understand that LFC still need more players in their defense, although we wont be judging their strength based on the fact that they lost to Milan 2:4 yesterday.