Good point. I think Ukraine would rather not have to go through those mine belts nevertheless.
Ukraine spent a lot of time taking out the artillery systems that would oppose them. Russia is going hat (and dignity) in hand to North Korea to get more artillery rounds and its only going to go so far.
Its an interesting time and place. Do precision strike weapons, area and air denial weapons rule the battlefield or does Ukraine's lack of offensive air power mean we really can't draw any conclusions?