You're absolutely wrong. It's this attitude toward security that is a main factor toward most of the Ethereum hacks to date.
- brilliant exploit by a hacker who was both skilled enough to outsmart many, many world-class developers all working together.
- malicious enough to forgo the generous bounty awarded for disclosing the exploit to the Common Colony security domain.
- detestable enough to willingly crash an enormously successful DAO
If you think one or all of these attack vectors are not something to be concerned about (or worse, be sarcastically dismissive about) you have no business writing smart contracts or anything security related.
- brilliant exploit by a hacker who was both skilled enough to outsmart many, many world-class developers all working together.
- malicious enough to forgo the generous bounty awarded for disclosing the exploit to the Common Colony security domain.
- detestable enough to willingly crash an enormously successful DAO
If you think one or all of these attack vectors are not something to be concerned about (or worse, be sarcastically dismissive about) you have no business writing smart contracts or anything security related.