Innocent until proven guilty is a legal standard...This is not really accurate (but see below). The notion of burden of proof shows up in debate, public discourse and logic as well as law. An alternative formulation of "innocent until proven guilty" "the one who asserts must prove". It's simply saying, we don't accept claims without proof, because the alternative is often the logical fallacy of argument from ignorance.
Every day you are constantly making assessments on people based on the information you have, whether that’s in the context of a crime or otherwise.
What you're describing here is the standard of proof, not so much the burden of proof. The plaintiff always needs to prove their case. In a criminal case, they must prove it beyond a reasonable doubt. In a civil case, there must be a preponderance of evidence. In our daily life, we should have some reason we believe someone is guilty of something even if it doesn't extend as far as the standards of criminal prosecution. This is still taking on the burden of proof.