I would guess this is about middle seats. No one wants them but if you’re part of 2+ party you’re much more likely to take one. The alternative is two aisles side by side but those are tricky to get as the plane fills up.
As a business traveler I actually want the price to be as high as possible while satisfying the company rules on airfare. The fare is fully reimbursed, so a higher fare means I get more points on my credit card.
Now the company rules on airfare will probably reference something like the least-cost logical fare. So it is in a business traveler's interest for all airlines to raise prices simultaneously.
Business travel is weird.
"It's just another way for airlines to continue 'segmenting' their customers, charging business travelers paying with a corporate card more while offering a better deal to families on the exact same flight."