I see your reasoning, don’t entirely agree with it.
I don’t go to the range and shoot 250 rounds with my shotgun on a routine basis (ouch). OTOH, when I do serious target practice I rarely use fewer than 250 rounds of LR. And I do a lot more of that than shotgun practice.
Last time I had my Browning A5 out, it ate through 200+ rounds.
Practicing my poppers for 3-gun.
Still wish I could afford a Benelli M3. Much better suited for what I’d use it for than my Browning.
The problem is that many folks grab the cheapest shotshells they can find, and they are usually field loads. Find some Winchester Super Target 1 ounce loads at 1180 feet per second. They'll break anything on the clays field and won't beat you up.
Or shoot 20 gauge target loads, I do and am competitive at the A class level in sporting.