even this can lead to problems. i entered my phd after working in the field for several years as a research scientist. because of my experience i have been put

even this can lead to problems. i entered my phd after working in the field for several years as a research scientist. because of my experience i have been put in charge of internships, advising many masters students, organizing workshops, etc. all on top of the research im supposed to spend my time doing. this is all okay i suppose, because i've been able to be a very productive phd in addition to everything else ive done. but my phd compatriots have a lot more time in their days to pursue their interests in comparison to me. i hate it when people say a person is "too old" to do a phd, but I think there is a place where you may be too experienced and it would be better to do a phd in another field you find fascinating but have no experience in.