Any EC and no EC “is worth it for T-50s”. My nephew was accepted to UCLA with band and one summer internship in a lab.
Most “T-50” colleges just want to see that you engaged in some worthwhile activity during your non-academic time.
Define “prestige”. My kid’s main ECs were a school-based club, a school-based dance company, and dance. My kid was nominated for, and received, a very prestigious full-tuition scholarship at a top school based mostly on the activity at that school-based club.
Do you want to do this EC? Will it interfere with another EC which you want to do more (I mean an actual EC that you are planning, not one that you perhaps may do)?
If the answers are Yes and No. It’s worthwhile. If the answers are No and No, it still may be worthwhile, since it’s short and could be a good experience. In the case of any other combination, it is not worthwhile.