We as humans place great emphasis on efficiency and convenience.
If we are trying to get somewhere and we have 2 choices of route; 1 taking half the time and distance of the other, we will always choose the lesser because it far more efficient/convenient.
Equally, we place great emphasis on efficiency and convenience in thought. It is preferable to think less about a thing than to think more about it. For example, if trying to obtain food, it’s generally far preferred to go for a simpler option than a complicated option.
A complex option requires more thought and more effort expended for potentially the same amount of sustenance.
These simple statements almost seems too obvious to even be said, but they hold great importance.
Efficiency and convenience are important because they lead to less energy being expended for the same outcome. It is similar to one of the core ideas in economics; a human will choose the option which will maximise their economic pay-off, that is, they will opt for the option in line with their preferences for the lowest possible expense.
The more time, effort and/or resources we expend toward a particular outcome, the more invested we become in the outcome.
Say you spend 10 minutes and no expenditure on a piece of work, and on another piece a week plus considerable expenditure. Your mind will unconsciously attach far more weight to the second piece of work because you have invested so much more time and resource into it than the first.
If the first piece is criticised, needs amendment or scrapping, it won’t be nearly as big of a deal than if the second piece would receive criticism, require amendment or scrapping.
You would naturally respond with far more emotion and intense feeling in reaction to the response to the second piece than the first, because you have invested far more time, effort and resource into it.
In short, the more time, effort and resource we invest into something, the more emotionally attached we become.