It depends on the terms the questions were couched in. And I suspect many of the responses come from the same place as I'd have come from before having my eyes opened to the aggression, misogyny, homophobia and more general foisting of the trans-agenda coming from the more vocal activists and their supporters. I can see no problem at all in young people doing as they want, wearing what they want, and presenting as whatever gender they please. It's no more shocking than dressing as punks or goths in my day in order to resist 'mainstream' stereotypes; particularly given so many trans people these days opt to remain intact and not to pursue any form of medical reassignment.
The problems arise with invasive hormonal and medical treatments which will almost certainly result in infertility and likely pose a risk to health, the ramifications of which are not yet apparent in medical science and won't become so for a number of years.
Anyone who advocates opening up such practices with minors who are not yet mature enough to make such life-changing decisions is IMO complicit in abuse.
To state so is not transphobia. But TRAs have a practice of silencing any dissent as bigotry, and appear to have an agenda that goes far beyond balancing the rights of women, trans people, or LGB people.