[yurikoif]

but still, it does not prove much of a bias in my point of view. SF was known for homelessness & crime & drug crisis back before the tech boom. it used to be the veterans with mental illness and nowadays teens or common people with such.

[amrocha]

I'm sure you can see how after your first justification fell through, you just came up with another one that supports your point of view.

This is called post hoc reasoning, or, in tech, decision-based data-making.