Absolutely. The Obelisk book is $60, and so quite easily might not be worth it to you if you only find some parts useful. Especially if you already own Lost Mines (as that is half the book duplicated).the price might be too high for that however, and if they want me to just take set pieces and run with them, there are better formats for that
My comment was more in the general sense where posters who make the "What am I paying for?" complaint seem to imply with their statements that nothing is worthwhile in a product if they have to make any changes whatsoever. Which is what I was arguing against, as I find that repetitive complaint too easy for people to just throw out there like it has any meaningful weight. A little more nuance is more meaningful and doesn't make them sound as sniffy (or whiny, if I'm being too uncharitable.)