Sure, you could respond to a debate point by visiting the motives of the ones making it, but it's a tactic that would get you kicked off a 7th grade speech and debate team.
To your point, though, Pete fielded a near worst in the league defense. He also fielded the best defense in football at one time. People assumed that the latter was no longer a possibility because of...reasons, I don't know, a solid case was never made...and assumed that "anything would be better". Well, now they have anything, and we are being told that we need to wait three years for the defense to gel.
A solid case was made. Carroll's teams had not fielded a top 10 defense since 2016. That is the better part of the decade being either a mediocre defense or in the case of half of the seasons, near the leagues worst. Carroll was also on the wrong side of 70. His defenses progressively got worse and we started missing the playoffs more and more. After the LOB scattered to the wind in 2017, the Seahawks had a grand total of one playoff win that came against a 40 year old McCown.
Carroll spent 6 years trying tying to rebuild the LOB, the results? A defense that progressively got worse and worse. Mind you, this is the guy that had full control of the FO and any coaching decisions, roster cuts and trades. At the time of his firing, he was among one of the oldest coaches to ever coach in the NFL. So tell me, what about Pete Carroll tells you that he could recreate the vaunted LOB?
Is it the piss poor playoff record, is it getting our faces stomped in by McVay, or getting punched by Shannahan later in his SF career? Was it the NFL talent he failed to develop or the poor fundamentals that started taking place under Carroll later in his regime?
Past results do not mean guarantee future performance. What about a 70 year old head coach that was struggling to keep up with the modern NFL defenses and offensive trends says that he would EVER repeat that? His contract was also starting to run out, what did you want? The Seahawks to wheel out the corpse of Pete Carroll?
Despite what I say, Carroll was still not a bad head coach, far from it, but it was time that we moved on. Sometimes that means you end up with a guy that doesn't cut it. Is MacDonald going to be the guy that doesn't cut it? We can't say that yet. He's a new head coach sitting at .500 with some baffling questionable results. Let us not forget that Pete Carroll took an 8-8 Jets team to a 6 win team in his first season as HC.
There is a learning curve. Carroll at the end of his stint here was NOT the answer, it was time to move on. Hell -- MacDonald may still not be the answer. That being said, I'm seeing a lot of revisionist history on Pete Carroll's final years here.
The guy was an NFL legend, but he struggled to adapt to NFL trends, in addition to that, Richard, KJ Norton Jr and Hurts were god awful DC hires -- specifically that last one.