First reason is that no matter how many times people tell you, "If you want a great career, you have to pursue your passion, you have to pursue your dreams, you have to pursue the greatest fascination in your life," you hear it again and again, and then you decide not to do it.
La primera razón es que no importa las veces que te digan: "Si quieres una gran carrera profesional, debes perseguir la pasión, perseguir tus sueños, debes perseguir la mayor fascinación de tu vida", lo oyes una y otra vez y entonces decides no hacerlo.