It might be the cheapest, but the price for the actual importance of each game is much less. When no one game really matters because there are so many, people might not feel compelled to go to any one game thinking they could feasibly go to a game at a different date with the same relative importance. The problem that MLB has is that people then don't go to as many games because they find alternatives and by the time the actual importance of the games is increased, most of the teams are out of the playoff race so there is even less reason to go.
And the game being slower and more boring now is a problem. From a basic economics standpoint, for any given price point, your utility is now lower while the utility obtained from competition at the same price point is likely higher because of the vast amount of entertainment options younger generations have. And on top of all of that, teams are actually raising prices when they should probably be lowering them to compete with the other options available to young fans.
To me, teams are making a mistake and are sacrificing potentially exponentially higher future profits for current profits by trying to find the absolute most they can get out of people for tickets, merch, and TV viewing. You might be able to make more money by using higher prices to offset (and more) the lower customer base, but you are losing fans in an asymmetrical manner such that you are losing the fans with the highest potential future spending (young people who have more years to spend money) while retaining those who will likely drop out of the consumer base sooner (older people who will no longer be able to attend games/die) while also doing almost nothing to replace those who are lost.
The worst part is that I don't think the owners even care. They are now getting so much from TV deals that they can make money even with poor attendance while the values of their franchises continue to rise seemingly partly because they do nothing but rise in value. As long as there aren't a ton of sales where they actually lose money on their investments or they all start losing money every year I don't think anything drastic will change. People suck at changing in small ways when something could possibly happen in the future. They are much better at reacting to drastic situations. While I don't know if my doomsday thought process will actually happen, I really fear it will.
/end rant