zahavasdad; There are numerous “chaburos” that do private runs in bakeries for the value of having personal involvement with the hechsher mitzvah. Then there are the basement and backyard bakers that take it to the next level. I, personally have been a backyard baker for 20 years or so, and having toured the micro-community as well as the commercial bakeries, there is no question that to do your own is a hiddur mitzvah. For example, a 100% whole grain fresh flour matzah is sweet and nutty tasting. On a leil pesach that is not Shabbos, you can take a 6 or 7 minute break in the seder before motzi matza to make some hot out of the oven matzos for the mitzvah. When pesach is motzai shabbos, it is the only way to have true erev pesachdik matzos.
In the tochecha after a cascade of increasingly harsh curses, it warns “v’hayu chayecha teluyim lech mineged” (devarim 28:66) meaning utter helplessness. In the gemara (munachot) it is quoted to mean, “this is one who sources his grain from the market”. The message is that we should ideally be agrarians in our land, and that a person should be in direct control of his sustenance. Al achas kama v’kama, one should ideally be in direct control of his spiritual sustenance.