No it's because Kaladin put him at risk. The system was made in a way that he had to have them killed.
Because if they weren't killed, he would be.*
I don't think you're understanding the point I'm trying to make. Gaz was NOT the problem, the system was. That's like blaming american POW's for manufacturing Nazi weaponry. They could've refused to do it, but then they'd be dead. And the weapons would've still been produced.**
*And while fantasy protagonists seem to find that it's an easy to sacrifice yourself, would you actually be able to do it for something as futile as this? Even if he did make the sacrifice, his replacement would have tried to have Kaladin killed anyway
**A bit extreme, but still accurate