It's been pointed out here already by multiple posters, this case has morphed beyond being about about Skubal and the Tigers in particular, it's about Boras and the Union wanting the arb scales reset and ownership wanting the status quo system of arbitration escalation 'rules'. And as has been pointed out, the Tigers didn't particularly 'low ball' Skubal, they made an offer than pretty much followed arbitration precedent. For Boras, repping clients that score bigger in arbitration is probably the area of biggest potential income growth for his business if he can get 'market value' established as a significant factor in future arb awards. Skubal, as a player rep, can contribute to something that will benefit a lot more players than the deal he signs next year.
OTOH, to mid market and below teams, a big escalation in arb costs would be the last straw in making them all 2nd class citizens to NY and LA as they will end up having to cut lose a lot of competitive players they would otherwise have kept.