They might be willing to try. But they didn't score because the goalie is there to throw out the case.
Although, the court tossing it out has everything to do with what law enforcement is willing to do. They might have tried it once in that link, but that hardly means they are willing to waste their time trying the same thing over and over when they already know it doesn't work.
Much of the purpose of tossing cases out when law enforcement oversteps is to keep them in line.
Why would they die? They control the playing field. Currently they are putting in regulations to cement their role as gatekeepers and prevent musicians from publishing music without paying them. They are also putting in taxes / levies / etc in many places to ensure they get paid regardless of whether they have any actual audience.
They control the legislation, and they are using it to ensure they keep getting paid. Growing or maintaining their audience isn't necessary for their plan. As long as they control the laws, they aren't going anywhere.
It will hurt the musicians and music industry as a whole, sure but not the legacy labels lobbying for these laws.
Just a note that we are talking about Quebec here.. Those outside Canada might not realize that are a bit... "special". They generally have different laws than basically everywhere else in Canada.. Including apparently having a right to "the safeguard of [one's] dignity, honour and reputation " (although not the right to dignity, honour and reputation itself) in their provincial Charter of rights and freedoms.
So they can use the "sentence recommendation software" when deciding the sentence as long as they don't let it bias the sentence. How that is supposed to be possible, as well as what purpose this recommendation has other than biasing the sentence is unaddressed.