@Ineb_k I can't answer that. I just think that there are certainly a lot of cucumbers in order to get a representative size for the index. In other words: I think that with many sector ETFs you also buy a lot of junk. I think I would look at the top 5 ETFs and pick out 1-2.
I use it for the sector, stopped thinking about individual healthcare shares since I introduced to my savings plan. Still have some JNJ that I'm considering swapping into this ETF too. Overall good choice of stocks in it with extra weight on some of the best stocks for the sector, feels pretty well diversified and "balanced" in potencial. Needless to say I like this one.