It was explained to me when I joined Ansett back in the old days of the two airline policy, that there were two schools of aviation maintenance philosophy; the Australian way which was proactive and had its core idea the maintenance of aircraft resale value and operational reliability throughout its long ownership - which was forced on us by depreciation and other tax rules, and the American way.
The American way was christened “buy it and fly it” - the Boeing maintenance system was the legal minimum maintenance requirement to meet statutory requirements during the life of the aircraft in the hands of an American airline. This was a lot shorter than in Australia. American fleets were kept much younger so they rarely saw the high time problems we did.
I don’t know if this applies today, but it’s axiomatic that Boeing is specifying the minimum inspection regime at present and I would have thought a prudent airline would be looking deeper as Steve Purvinas recommended.