Continue from here against AI on analysis board

Is there any particular reason why "Play against AI" is disabled on analysis boards?

What I mean is that you cannot continue from here in links like this one:

lichess.org/analysis/r1b1k2r/ppp2ppp/5q2/2bBN3/3nn3/8/PPP2PPP/RNBQR1K1_b_kq