OK, thanks for the advice, I restored the sidewalk.

I don’t know if I am expected to have a strong opinion about this "permissive vs. private" tags.  It looked fairly natural to open the western sidewalk because it is connected to the stadium; as for the road it can also make sense if people are expected to drop passengers here.  No strong opinion about the second sidewalk.  For the sake of coherence, we might want to apply the same tags there too.