If you provide people with easy, convenient, legal methods to consume the content in a way that works for them, for a price they find reasonable, then they overwhelmingly won't resort to illegal means.
I'm not saying these bars are correct to resort to illegal streaming, but a wise businessperson would see this as a signal that their product offering doesn't actually match demand, and work to fill that demand. You're not going to make 100% of people happy in 100% of cases, but you can get to a point where the level of illegal streaming just isn't worth cracking down on.
It's such a sad waste that all this money has been spent to identify and track down illegal activity when it could have been spent making the overall legal experience good enough that most people wouldn't need to resort to illegality. It adds insult to injury to note that companies like La Liga are already making money hand-over-fist; it's not like they have some sort of crisis where the lost revenue due to illegal streaming is posing an existential threat to their business. Instead of cracking down and making enemies, they could instead work to make the experience better and turn potential enemies into satisfied customers.