I think any fabric can bleed - you can have one lot that quality control has missed. One lot in a huge run.
New regulations for dye - for both workers and users safety. How many times have you seen a warning for a safety correction and the correction is worse than the problem? Things might be fine for months, even a couple of years and a new laundry detergent causes all kindsof problems.
I don't think it's either deliberate or laziness. It could be that if a fabric Co. says fabric will run, it's whole method of dyeing, including proprietary processes might be revealed and leaked.
The worst I've ever seen was a very expensive dry clean only dress with plenty of instruction on how to dry clean, but neglected to tell anyone to cut off the buttons. The buttons were not dry cleanable. One very big mess.