No one reason for any of the “soil” types. I think we are all at various points of soil at different stages of our lives.
Some are born into better circumstances than others, being exposed to the gospel early can be surmised as an advantage, but it can also have a negative effect.
You can be born into an atheistic environment, which made be a disadvantage to believing, but not necessarily.
The gospel seed, according to Jesus, is hindered or even thwarted by the nature of the soil, the condition of the heart at the time of hearing the gospel, and these conditions are described as being temporal experiences, “worries, riches, pleasures of life, persecution, etc. Sometimes the truth of the gospel is just snatched away by the devil.
Ultimately, these elements are influential to our choices, but the choice of the will is its own volitional response.
Doug