ELI 5: why do most locks not have security (spool, mushroom, &c) pins? Those are absolutely harder for a beginner to pick, and also provide a measure of security against bumping.
edit: And there are a lot good lock companies producing quality locks. They just cost like $100 (and way more for doors. A quality abloy lockbody and the stuff on the frame is like $300+ without work) for a lock while a cheap one costs like $5. Though expensive does not mean good some are just scams so be careful/read up on what you are buying.
And still even these good ones are pickable just require hundreds or thousands of hours (and specialized tools) to become good enough to do it reliably instead of 5 minutes.
And for doors once you put a quality lock on it you need a skilled worker to properly install both the lock and the door. Look up some physical pen testing videos online how shitty installs the worlds is full of. Basically you can get in through so many doors with a small piece of scrap plastic.
Also once you get a really good lock a locksmith (or pretty much anyone for that matter) will not be able to pick it. So if you lose your keys it will have to be broken and then you are out your expensive $100+ lock.
Even cheap locks are good enough that in most installations they are not the weak link.
Why bother? There's no skill to angle grinding off a lock shackle, literally anyone can do it.