Dillashaw claims that six weeks out his body started to crash due to the weight cut, thus he took Procrit in order to feel normal.
The problem? He did a test cut back in May-Jun of 2017 in the middle of his fight camp for Garbrandt, as such he would've been aware of this "crashing" beforehand when it came time for the Cejudo fight.
For reference, Demetrious Johnson cut from 142 lbs in the Cejudo rematch.
1 week and 3 days before the fight, Dillashaw was as high as 138 lbs:
Which begs the question of what he weighed 5 weeks prior to that when his body allegedly "crashed". Because if he did a test cut in 2017 and dieted down to 140 lbs, and didn't experience this crash, then why did he experience a crash at a much heavier weight? The answer: he didn't experience any crash, it's nothing more than a lie.
Dillashaw is simply trying to spin the narrative that he took this substance for his health, and not to gain an advantage over his opponent, and that he only did it for this one fight.
As far as this being a one time thing, Dillashaw was specifically called out for EPO by Garbrandt one year before the Cejudo fight:
Garbrandt could've said "steroids", or been even more vague and just used the blanket term of "PEDs", but instead he named the specific substance that was flagged in Dillashaw's sample one year later.
Owning up to something means that you admit wrong doing and don't give any excuses, but by speaking out now, three months after the fact with a litany of excuses, makes it look like he spent this whole time coming up with a story that could dampen some of the damage done to his reputation.