If by capitalism you mean 'profitable' then Boeing was more so before they started making shitty products.
The reality is companies and all organisation, for many reason change over time.
Ah yes, the aerospace and airline industries are just really overrun with free market ideals.
As opposed to agents motivated by conformity and an eye towards bureaucratic values?
Humans are self interested. This is common across systems. What differs is how we orient those interests in concert or competition, and when that dial is turned.
So where are the profits? Boeing hasn't made money since 2018 and I suspect their revenue per employee is very low.
They are "too big to fail", part of the ministry of defense, and a large make-work program.
> they consolidate into monopolies
Indeed there are about 3 aerospace companies setup to server the US government. It regulates everything from how paperwork is stored, to what tests candidate employees must pass, and which parts they can order.
In the commercial sector all of their customer's requirements come from the government.
> Airlines are less regulated today
In what ways?