YABVU.
Of course if you stopped when your baby was still a babe in arms, you will see it as "odd" or however it is you described it as. If you do not stop, then it is a natural progression of BF and a perfectly healthy natural progression of BF.
OF course the thought of picking up your toddler now and BF is going to seem strange to you. That is because you stopped at 7 months. You did not just continue with what you were doing.
Judging others for doing so, is what is odd . We none of us have right to make such judgments on another mothers decision to carry on BF.
I BF my DD until she was just about 2 yrs 3 months. I only stopped if I'm honest, largely due to pressure, or perceived pressure,from others. Like it was a dirty secret. Oh and my brother in a typical brotherly teasing way, saying all kinds of things, which again actually made me feel "like a freak" for doing it. ( he'd incidentally be mortified if he knew it had any baring on it)
She also was beginning to not be so interested, only really really wanted to 1st thing in the morning, and I got fed up with her basically knicking helping herself to it, whilst I was asleep. And waking up cold due to lack of pj top over body, oh and the bouncing of the other one with her hand as she fed happily from the other side, or lifting said other side up by the nipple.
That said, I miss it dreadfully. she's 3.5 now, so also couldnt imagine doing it, but would not have issue with another mother doing so, at all, in the slightest.
So, yes, YABU.