Well... I am undecided. My opinion forms somewhere in between your posts.
Starting from the beginning, I have a very distant memory, from when I could have been 3 or 4 years old, sitting on my bed in my room, leaning against the wall with a bulky diaper, waiting for my dad to read me a bedtime story. It felt really very comfortable and I do not remember much else from that time. Around the age of 12 I started fappin and questioned my own sexual orientation with conclusion i was definitely gay. My fantasies were getting weirder, including a wish to be someones dog as a life purpose. And I was all fine with this, I accepted that sooner or later and pursued it. Rediscovered interest in woman was positive news for me when I was ~16, but my fantasies and fetishes made forming relationships almost impossible, as I could not free me mind from my sexual desires. Turned out there is more in relationships than a fulfillment of slightly selfish borderline sexual wishes. DL fantasies came to my head at ~ 20, so I bought some diapers, enjoyed them, wet them, tried messing once, self-accepted this as a new fetish and continued to study.
Now I am 22, almost a year ago I found a girlfriend, she claimed she likes being dominant, I was happy and it looked promising. We were dating, cuddled a lot, she did not now about my DL part, I was mostly playing a puppy and I was totally fine with that. Then once, she wanted penetrative sex and did not lead me the way I would be comfortable with. I panicked because of the inability to fuck her like a man or even a dog would and things did not work out afterwards. First serious relationship brought me some kind of mild penetration fobia and kept me a virgin. I would like to love the irony of it, but it feels more like... bitter.
Not long after that incident suddenly even AB stuff gave me a huge boner and there are possibly two ABDL positive girls in my country... So I am seeing a therapist since autumn, because eventually all this led me to abuse marijuana to dumb the feelings of loneliness and to forget my inability to form relationships as I would like to. Most of the time, I was completely fine with my fetishes spicing things up, but it seems like a more serious issue. And recently I am undecided... Is it a fetish that is part of my identity or is some kind of developmental abnormality / psychological issue I maybe should do something about. It is probably not possible to "cure" or "dissolve" it, and so I understand how one can be mad at urges out of ones control.
TLDR: My sexual progression is getting out of control: nothing -> definitely gay -> puppy play is the meaning of life -> not really that gay -> wow, diapers! obviously I cant resist that... -> I would love my hypothetical partner to treat me like a two year old. -> where is this gonna end?!
Also please forgive my English, writing is quite harder for me than reading.