Where you comment may reflect the airline industry as a whole it does not reflect Delta.
Delta was offered but didn’t accept any CARES Act funding, additionally they chose to do voluntary furloughs and a buy out instead of laying off employees. Yes this did cause them to lose some senior talent, but it was not forced.
Source: I know people who worked for Delta during the pandemic. Most took a month or two off and then returned to work on 4 day a week scheduled for 2020. A few took the buy out, which gave them good lifetime benefits.