First one is not true.
We successfully version database code using Git, have working pull requests, continuous integration and delivery.
Second is not true as well. For instance, T-SQL code can be tested using tSQLt framework. Yet again. This is more difficult and not a widely adopted practice, but it's possible and companies do it.
But in any case. Even though things are possible and can be done in database, it doesn't mean it should be.
Database testing is a nightmare I hope to never repeat. Just because a thing can be done do not mean that it should be done.
It's not true in anyway that DB code is hard to test. As long as the person is aware of DB based code units it's just the same.
Maybe you are right!
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