Casual viewers like games with lots of hits and lots of runs, and the MLB has gone through a lot of effort to facilitate this (ie: runner starting on second in extras), but as someone who is really into the long-haul aspect of baseball (I like the whole farming and development system, I like the idea that baseball is not fair in terms of cap space, I like that the season is so long with so many games, I like the strategy around managing the bullpen), I really like watching "boring" games where pitchers are just throwing disgusting nasty pitches for 7-8 innings. There is nothing more exciting to me than a no-no. I really don't have any issue with foreign substances -- it's still impressive nonetheless.
To me, baseball is the only sport where fandom really makes sense. In basketball, you'll see fans of players moreso than teams -- their fandom will follow ie: LeBron around. And why shouldn't they be mostly fans of players? The coach and management makes little difference. This is opposed to in baseball where when you're a fan of a team, you're also a fan of the management and the owners and the coaches and the little decisions they make over the time-span of weeks (and even years) to get to a winning team. A lot of pieces have to come together, you can't just buy a superstar -- although you're free to try.
When one pitcher can throw nasty stuff (not necessarily throwing hard, just throwing precisely) and save his team from using the arm of someone in the pen, it's super exciting to me. If a little bit of pine tar is facilitating that, it's all the same to me.