The argument that TLJ is art and therefore its all subjective and therefore matters little if we like the film or not, in my opinion, is a nice superficial argument to dismiss how bad the film is and why we "haters" of the film and our opinions of it are unimportant. Sure, 1 person's opinion is subjective and (largely) is inconsequential. But a lot of people's "subjective" opinions matters a great deal.
I think Disney are worried about how bad the user (not critic) scores of the film are. They bought this IP for a lot of money, not so as to simply break even or generate a short-term profit from it -- where it stands at the moment, to be honest, I have no idea. It was part of a long-term sustained revenue for them generating 100x (if not way more) on what they paid for it. Publicly they aren't worried, internally I am certain they are looking at this seriously as to how viable the SW licence is now to them and what they can do about it going forward -- like hiring a new writer/director team to entrust the future of SW with.
I'd like to also share another "subjective" observation with you. When I saw TLJ at the cinema, it was the first time in a long time that I saw people start getting up and leaving half-way through a film. They never returned. Mind you, this is a Star Wars film. On the film (finally) ending, only 1 person -- a young man -- was clapping and cheering like you normally expect at the end of a Star Wars film. He abruptly quit when he released he was alone, and not even his companions were clapping with him. Most, were sitting there in silence.
Sure, the film made money, but that was due to many people being mislead about how good the film was. How many went back for multiple viewings as SW fans tend to do? How many are going to bother to see the next SW film at the cinema, instead of waiting to see it later digitally and potentially for free? How many are going to buy the merchandise for a film they do not like? How many are going to want to buy media based on the expanded universe of TLJ or future SW films?
I think that these are all questions Disney would be asking.