It is possible to produce a garden without store bought tools. You could use a stick to dig I suppose. I’m guessing the majority of us do not do this.
Having the proper tool makes our garden toils less…toilsome. Proper care of our tools can keep us from having to replace them.
I live on a budget. At times, that budget is confining. When I have money to spend in the garden, I like to buy seeds, or plants or trees. I don’t want to have to replace a hoe, or put a new handle on a spade. However, as a so called adult, I realize that this is what needs to be done, so I do it.