I am in favor of more density in San Francisco, but no matter how negatively we feel about nimbyism we must acknowledge that current blocks are tightly packed w

I am in favor of more density in San Francisco, but no matter how negatively we feel about nimbyism we must acknowledge that current blocks are tightly packed with single family homes or at best 2-3 unit buildings, and people live there. This creates an obstacle or delay if we think they should be demolished and replaced with denser housing.