1000hr pilot is more safe and efficient than a 250 hr
I disagree, a 250 hour pilot is fresh with the rules and generally more prepared and conscientious. A 1000 hour pilot is sometimes a little too comfortable with their self expressed experience and often become a little cocky with weather and pushing the margins a little more than they would have previously (proved by your above sentiments)
It generally takes a good scare before they are back on track again. (which most of us have had)
If you look at most single engine fatal accidents in the charter world the pilots have varying experience between 600-1200 hours. Multi engine accidents however are usually in the first 200 hours of experience.
In regards to yourself staying for at least the dry, so will the 250 hour pilots trying to get to the magic 1000 to get a multi engine job, you already have the tonne, so in the operators eyes you won't be a sure thing no matter how noble your intentions are to begin with.