But that would be worse.
The A14 came out in 2020Q3, the M1 in Q4, the M1 Pro and Max in 2021Q4, and the M1 Ultra in 2012Q2 — a span of almost two years.
The M3 was even more staggered than that: the A16 came out in 2022Q3, the M3, M3 Pro, and M3 Max in 2023Q4, and the M3 Ultra in 2025Q1 — two and a half years!
Should the iPhone, MacBook Air, MacBook Pro, Mac mini, iMac, all be delayed, by months or years, because the Mac Studio comes out later? Should the Mac Studio be artificially made worse so it can be released at the same time? I don't think you can resolve that complexity.
They try to keep things more in sync on the software side. Oftentimes, they ship macOS a month later, in October, but for the most part, all of their main software platforms ship in fall — iOS, iPadOS, macOS, watchOS, visionOS, and stuff like the HomePod's OS. This comes with advantages: it's less confusing to users (especially now that they've even synced up the version number; it's clear to everyone that "26" is current, no matter the platform), and it gives them better interoperability (for example, if they add a new feature to Notes, they can expect that Mac users, iPad users, etc. all have it within a few weeks). But it also comes with pressure, and I think that helps lead to quality issues.
So in that sense, perhaps Ternus and Srouji have a different philosophy than Federighi; he wants things synced up as much as possible, whereas they ship something specific when that happens to be ready. The one exception being the iPhone, which presumably has a mandate from Cook and Joz to ship in September no matter what (I think it may have slipped to October in 2020?). Srouji can't say "well, we're not gonna have a new chip ready"; it's gonna ship. Federighi can't say "well, the new iOS is kind of buggy"; it's gonna ship with the new iOS. That strictness gives them better sales, at the cost of day-one problems with new iPhones, which might hurt their reputation.
But on the Mac? They just wait until it's ready. It's been years since there has been a hardware problem on day one. Whatever the reason, the M5 was ready, and the M5 Pro and Max weren't, and the M5 Ultra — if it exists — certainly isn't. So they decided to ship the M5 now.