Yes... And quite frankly, that the truth. Ppl initially would barely say how JJ conveniently chose the best opponent in the division, few ppl would say that Sergei should present more challenge, but they weren't even sure if that because they knew that Stipe was only 4 years older than JJ, and that JJ has also been ring dusty almost as much as Stipe and that Stipe has fought his whole career in HW while that would be JJ's second HW fight. So they always recognized Stipe as legit, even though he might not be on his best, they knew that Stipe was as tough as nails and that Stipe even said he'd train as hard as he could because that would be one of the biggest chances of his life --- he openly said "I love that I will be facing JJ... I know I will be the one to defeat him"... According to his coaches, he trained as serious as when he would have big fights like the first fight against Ngannou... And that will, knowing the impact JJ has, isnt going to take much from Stipe when he isn't 50 yo and the fact he wasn't in a fight since the brutal loss to Ngannou, is actually helpful because, as many fighters say, time out of the cage helps a lot... And Miocic trained very hard, he said he swore to his wife he wouldn't commit the same mistake of thinking being lighter than normal would be best vs Ngannou, which to him made him less resilient to the punches and his punches packed less power, and so he said he would be as heavy and thick as he could... A big preparation as Stipe did, knowing that would be the last and only fight he would be interested in and would make sense to him, would naturally bring one last time even if not prime, a close to prime Miocic.
But JJ was simply better... He is too good... Miocic took a severe punishment of 50 elbows and still remained standing until round 3, which shows how tough he was. He was, in that fight and last moment to shock the world, bringing for the last time, maybe the best version of him, knowing it'd be the last time he'd need that. And that's it. It'd be different if JJ was a no name fighter, and took on old Stipe --- being a no name up comer, JJ wouldn't make a veteran so interested in the fight, it wouldn't bring back that burning passion to perform close to his best. But JJ's name is so big that it would. So much so Miocic is so respectful that he'd even praise Ngannou's clothes in press conference in legit and genuine, ways that would make Ngannou laugh saying "you are just so respectful always". Chael even laughed because calling JJ a bitch was the first time Miocic insulted anyone and the worst insult he ever used was ""only"" "bring it on, bitch". Which shows he was fired up for that opportunity.
But then ppl acting like Aspinall making a meme out of JJ fighting Joe Biden, ppl inventing stuff about him being with CTE, which only happened when Aspinall won the interim champion and ppl wanted JJ to make one more fight, so they tried in all ways to take legitimacy from the fight as hard as they could... So that would sting Miocic, actually. The respect he got with ppl saying he is only there because he wants the money. If anything, the "I'm done, thanks God" may be his frustration with how unfair some fans can be that he is happy he won't fight again with the current social media trend of completely shitting on someone and making the fight a "joke fight" stuff. He wouldn't have to deal with these BS narratives anymore from ppl that completely takes credit from his deserved title shot there. Ppl acting like the disrespect came from JJ picking Stipe, even saying that was another Jake Paul vs Tyson --- are those ppl trolls or just total morons? Comparing a 42 yo with a 58 yo, comparing a 27 fighter vs a 58 one with a 37 yo fighter vs a 42 one... Shows the level of intelligence of fans actually ---- that was the disrespect. Ppl, like always, try to twist it so it always fit their biased narrative.