Agreed! This is a quote from the Equipment page on my website, published 5 years ago:
"Why do some suppliers list tent features (or other items, such as stoves) without including any weights? This should be one of the most important points! Some of those that do list the weights do not stock any that I would regard as light, while others claim theirs are light when they are anything but. It suggests to me that they have not seriously considered this side of things or, worse still, that their main interest is taking your money. After all, they will not be the ones carrying it. Do remember that you will be."
However, I do think the matter has improved a little bit since then.