"I'm about to turn 34. You say that seems very young, but if I was pregnant now, would you feel the same?"
No, definitely not. As I said before, adoption is something you can do at a variety of ages, having a birth child for women is more time limited (unless using donor eggs). Of course for men it matters much less.
"...does that mean I need to wait until I'm a lot older when people my age who could get pregnant don't have to? I'm not entirely sure I understand your point about my age!"
My point is that your thread is "When to take the plunge!" And I said "If you are adopting you do not have that (speed requirement with giving birth). However, the older you get I guess the more worn out you get!"
If you were asking about getting pregnant I would say do not delay.
"Sorry if I'm misunderstanding! If I had been trying to conceive for 6 years and was now turning to adoption at 34, would that make a difference?"
I guess what I was trying to say is you can choose the time, so if you wanted to spend time saving up or building your network, you have time. That is all. If you had been trying to get pregnant for six months you may feel in a different place, or you may not, only you know if you are ready to start this journey so in one sense we cannot really tell you but we can tell you things that are different about adoption because that is what we have experienced. I hope that makes sense.
I wasn't making a dig at your age, I was saying you are young in adoption circles in my limited experience. 
"I can't live with not being a parent so it doesn't feel like a tough choice to me. I do get that I don't have the biological clock ticking... " It's OK, I think we all know how it feels because I was determined I wanted to be a mum, whether I got married or not.
"I am great with kids, and I've dealt with everything from severe learning difficulties to traumas to long term medical conditions and an awful lot in between. I think I have a lot to offer." It sounds like you do. 
So maybe the question should be why is no now to the time, and if you cannot think of a reason then now is the time!!