Is hacking even feasable in this modern defenses?

I'm basically a beginner in this field. I've done a couple of research and ctf challenges, where exploiting those vulnerability were pretty straight forward.

But I realize that in real world systems, there are many security practices with skilled defenders, coders, vulnerability checkers, and heck, even firewalls, ids and ai exists to make it seem like impossible to hack anything.

(ofc I haven't acually tried tackling real life systems so I might be wrong)

submitted by /u/Old_Scene4218
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from hacking: security in practice https://ift.tt/jr4RG2e