fertilizers come in two types. industrial and nonindustrial.

industrial fertilizers are based on industrial processes that generate chemically pure product. this product is usually viewed similar to salts. salt is naturally found in soil, but too much can burn your soil. same thing for industrial fertilizers.

nonindustrial fertilizers are commonly derived. these would be based on "waste" products. not all of them are based on the fecal content, some are processed food wastes, animal waste(dead fish, pork, beef, etc). the process to derive the fertilizer basically speeds up the decomposition of naturally occurring materials found in the world.

you will have better long term results using nonindustrial fertilizer because it is easier for the soil biome to naturally break down the necessary components for plant life faster than industrial fertilizers. this allows the soil to rebound faster and toxicity to remain low.

industrial fertilizers tend to build up in the soil over time and turns the soil toxic inhibiting plant growth aka "burning".

unless you live in an extreme environment where it's impossible to grow plants, I would avoid industrial fertilizers.

personally I use the nonindustrial or organic fertilizer with much success.