everything is a compromise
making a variety of barrels would force them to increase stock, tooling costs, setup costs etc..
in most bottleneck cartridges, longer is better for speed, but folks have been drinking the Koolaid that 28" or 30" is too long because they are biased by the bolt action.
you'll note, no one balks at the 28" of tube hanging off the Browning Single Shots. or the 32" BC's
My Ruger with 26" is just a bit shorter than a bolt action with 22" barrel. I'd have no issues with a 30" on it, as it is already too heavy to carry, so I have one of my shooting buddies carry it for me, and only hand it over when i need to shoot.
I also think weight has little to do with it, as most bolt actions are far too heavy now, with larger cartridges, HUGE scopes, bipods hanging off them... sling/swivels.
take a tour of a Big Box Gun Store, and watch who is coming in and the questions/answers.
I find that at least 75% have no idea what they really want, and why, and the guy behind the counter is more interested in a sale, than setting the buyer up with a proper gun for what he/she wants. and the buyer has experience only from reading the trash in gun rags that have rehashed the same ol' **** for the last 15 years.
Those of use who want and own more than 2 or 3 guns have a pretty good idea of what they want, for what they want to use it for, or at least understand the factors involved.
but WE are NOT the bread and butter of the gun industry.
and so the compromise.....
unfortunately, I have the gun gene, and am not capable of having only 2 or 3 guns
JMHO