Not the material aspect of what it can buy - but the freedom to not have to work is where the big boost of happiness came from for me, though I cannot guarantee it would for you if you truly love your career. For me, programming was always just a tool, a job, a means to an end. Sure it's kind of interesting, but there's far more interesting ways to spend my time.
Also, I hate bosses, performance reviews, bullshit non-producing jobs who make up the majority of your tech peers, commutes, forced social small talk with people you don't like, etc. So even if I 100% loved what I did everyday, I wouldn't like all that BS that comes with it.
Now, being able to spend my time as I please with full autonomy - that is where the incredible boost in my happiness has come from
