Obviously I won't share where I've gotten my files over the years for media but as a physical collector as well, the prices for some bluray collections of things is outrageous and would like to make my own that look somewhat professional. I have a bluray burner and blank bluray discs.
If you can find Blu-ray isos, yes (if it fits your blank bd25 or bd50, if it's one of those newer bd75 or bd100 it must be re encoded)
But they're not easy to find