Acquiring:
Blu-Ray - Drive to the store, find the movie you want, (In some cases make sure it has the special features if you want those, which will cost more), wait at the checkout, pay, drive home.
Alternatively - Go the the store’s website, type the movie name, enter credit card details, wait for delivery.
Piracy - Go to Torrent site, type movies name, download. (Optional - spend an extra minute looking for the torrent of a lower quality because your TV can’t display 1080p anyway, and making sure it has special features if you want those)
Movie is ready to play in less time than it would take to drive to the store.
Playing:
Blu-ray - Find the disc, put in player, wait for ads on media you have purchased and own, (alternative - pay more for a better player that skips ads you don’t want to watch on the media you paid for and own), wait through needless menu animations, watch movie.
Piracy - Go to your movies folder, open the file.
There is no metric by which Blu-ray is more convenient than Piracy unless you live somewhere with lousy internet. I have on more than one occasion downloaded a torrent for a movie I own the Blu-Ray for because that was faster than finding the disk with the added bonus of skipping all the faff on the disk (ads, menu transitions). The only argument for purchasing a Blu-ray is to support the creators, and if they want me to spend money for a worse experience then the studios should not be making it even worse by including ads.
Every time I purchase a Blu-ray to support media I like, I watch it and I am immediately reminded of all the annoyances that make me regret my decision.
Netflix was so successful because it was easier than piracy. Now there’s a dozen different “me too!” services and I could check each of them to see if they have the movie/show I’m looking for, or I could just go to a torrent site that I know has it.