I was a care extender at UCLA too. It's only 4 hours a week. I worked full-time and did research while doing this program. The commitment is not enough in my opinion to limit you to one or the other.
I disagree with
@acbakshi on what you do as a care extender. I did way more than restock and clean. There's a reason they want you CPR certified. I helped with codes on multiple ocassions. I witnessed 15 live births - 12 vaginal 3 C-section. I helped clean and irrigate wounds in the ED. I know some people that said they got nothing out of it, but they also were only looking to check boxes. Also, again, low time commitment and at the end of the day, the program is reputable and an AdCom is not going to say it's not clinical enough.