First, the penalty for the strategy of "not-thinking" just on a tactical level isn't 1-2%, more like a minimum of 10%, and a maximum of 100% or more when you take into consideration accumulation over time.
Second, from a "strategic" perspective, "not-thinking" leads to "not-understanding" the myriad "choices" presented/available to you- where often what's presented is very different from what's available, and often serves someone else's interest much more than some other available-not-presented option may serve yours.
Third, the state of "not-understanding" leads to the use of seemingly helpful services like Mint. In doing so you are making an enormous sacrifice in terms of privacy. There are rules that prevent the state of your deposit/savings data from being shared by the custodian (many more than the state of your credit data, for hopefully obvious reasons). To use those services you have to provide them with your deposit/savings credentials, and once they have them, that data gets out in the wild, which can have unexpected deleterious effects, particularly if you are a person of color, or a woman, or wind up in a weak financial position, which may happen for unexpected, surprising reasons.
The financial industry is predatory. Full stop. The industry harvests from people who choose to not think about it. There is so much- too much- money in the world, but to everyone individually/organizationally it is a scarce resource. Every day I see grim occasion to think about apex predator Danny DeVito in a David Mamet movie called "Heist"-
"Everybody needs money. That's why they call it money."
Good luck!