Then maybe companies should stop firing people with experience and knowledge. Maybe they served a purpose after all.

The family run supermarket I'm very familiar with that eventually was taken over by Hannaford absolutely had their own HVAC techs. Years ago at least.

You know what Hannaford did to that store after they bought it? They said that it would have to be a "smaller" store in their system, with less product diversity, fewer departments, less attention, less investment.

Do you know what that store was famous for, and why Hannaford placed it as the center of that deal? Because it did really really well, ran very profitably, and was essentially preferred by the (poor) community despite the Walmart 10 miles away. This store was so well run in the opinion of Hannaford Corporate, that they gave the former assistant manager, who had a working relationship with Hannaford for 20 years, priority over other internal applicants for high level management roles in order to get him to fix their problems at other stores. They lost another valuable manager due to that decision!

Their problems at another store were that it takes in $1 million a day but they refuse to pay more than local minimum wage to staff it. They struggled to keep that store staffed well, and this store in one of the wealthiest neighborhoods in the area looked like shit because stuff was never done.

Hannaford is currently seeing incredibly stiff competition from Market Basket and Costco. People who have trusted Hannaford (in the new england way where it means something) their entire lives are turncoating to Market Basket because why the hell not? It's just a store. They all suck. They can't compete on prices because distributors and upstream corporate behemoths set the prices. They can't compete on quality, because they buy that product from the exact same truck. The company explicitly has chosen to go the direction of competing on vibes of "Upmarket" product lines from the in house brand.

You know what Hannaford didn't do? Raise wages. You know what that Manager eventually did? He re-retired and gave up the good pay, good benefits, reliable and easy income to trade for being a physical laborer and building decks for rich people, because then nobody will be so stupid as to tell him to not do the things that he knows would improve things, and has the 40 year career to back it up. Hannaford had been courting him since the 90s, because that's literally how competent he was. This man went back to destroying his body, after a diagnosis of Rheumatoid Arthritis, After a new Marriage, after economic uncertainty, because he literally wasn't allowed to be a good fucking manager of a business that he has known in his bones for decades. They didn't let him solve all their problems! Because either that would have affected how they want their profits to work, or because that's just how stupidly pig-headed and petty the modern Executive class is.