Corp lawyers job is to derisk and protect the company.
Strong copyleft risks converting private IP into something that must be shared publicly. This is what these licenses are designed to do. Blanket bans on specific licenses makes sense because they don't have the time to evaluate every potential case or usage
How many of the copyleft projects actually have a commercial offering or paid support plan?
Who said anything about a commercial or paid support plan?
The price the corp doesn't want to pay isn't money.
There are no potential edge cases to worry about if you aren't trying to live on renting copies of the same software to many people in the first place. Then you can live it even greater safety with no need to even audit anything.
Strong copyleft risks converting private IP into something that must be shared publicly. This is what these licenses are designed to do. Blanket bans on specific licenses makes sense because they don't have the time to evaluate every potential case or usage
How many of the copyleft projects actually have a commercial offering or paid support plan?