@deadwolf I couldn't agree with this more. Don't forget durability in this conversation, too. Some stated "low weight" pack doesn't do much good if there's a failure.
I have a former daypack that I used to love. It was a higher-end brand that will remain nameless. It was a great pack...right up until it wasn't. For the specific use of day hiking on trails it was great. For East coast day hunting with minimal day gear it was also great. But after using it for high-mileage DIY Western day hunting out of a base camp loaded out with necessary Western hunting gear and optics (85mm spotter and tripod) it was awful. Not only was it woefully uncomfortable, I had multiple failures in stitching throughout the pack--including the internal frame stays blowing out of their retention pockets. While the dry pack was relatively light and many folks would be drawn to that number, it didn't work for that specific use.
After sending it to a 3rd party shop for repair and reinforcement on my dime in the off-season—as I wasn't going to blame the brand nor expect them to fix a problem that may or may not been a manufacturing issue but instead my choice to load up with optics & Western gear—I tried to use it another year. More back pain and more failures. It would have been far better for that pack to have been built better at the cost of additional weight for me to 1) have not been in pain and 2) to not have initial failures year one and additional failures year two (even after repair and reinforcement). I think the manufacturer was chasing low weight at the expense of performance and durability.
I believe folks should more actively take a holistic view of their
use of their gear vs. looking at one line in a spec sheet—the weight row—which too many times seems to become the arbiter of a purchase decision, for winning bragging rights in a mythical low weight contest, or be the determinate for that pack being considered "good" or "bad" based on stated weight. If it's more comfortable and it holds up, weight becomes less relevant. For me and my decisions, weight is very much a relative term based on my intended use and the associated comfort and durability of a pack.