Happiness is exactly the same in every human being - is just a certain type of chemistry. In which ways people find access to it depends on person, environment, society and your background - this is what is unique.
But all these things are indirect and involve (unreliable) mediums. There are ways to access this directly and be happy and ecstatic every single moment without literally anything.
This is correct and congruent with what science knows as of today. I sometimes wonder how the world will look like when we would have evolved our science to (perfectly) control the ratio of chemicals inside us.
Imagine, happiness on a click. Something like quick dopamine release without side effects.
I am afraid such happiness would destroy us. Or make us a docile sheep with no ambitions. At least part of humanity accomplishments is because challenges induce chemical imbalances, they take you out of your comfort zone.
I would like to add that this science already exists for thousands of years in such sophisticated form that it does not require external chemicals but rather focuses on enhancing what our body can naturally produce.
Imagining this gives you a bit of entertainment, but experiencing this makes imagination a childish game :)
But all these things are indirect and involve (unreliable) mediums. There are ways to access this directly and be happy and ecstatic every single moment without literally anything.