Voadam
Legend
No. DRM is disabling copy/paste.
Often, but not always require on-line activation, and DRM includes which device the media can be transferred to, meaning that disabling the ability to copy and paste from something IS Digital Rights Management, because you don't have the right to copy or paste, and that is being managed by the digital media itself.
WotC originally had all their 3e pdfs on drivethru/rpgnow under specific Adobe DRM that required online activation and limited the number of registered computers that the pdf could be put on. After customer feedback they later went from this DRM to watermarked PDFs and said they did not plan to go back to the DRM. And they have not gone back to the Adobe DRM program they were using before.
Rpgnow/drivethru had three levels of pdfs, DRM with the adobe program, watermarked pdfs, and straight pdfs without the Adobe DRM or watermarking. The underlying pdfs always had the option of copy/paste disabling/enabling.
Claiming a broad definition of DRM to assert WotC went back on what it said it would do is not helpful in this context IMO.