Inter were lucky that they were able to equalized so quickly, I think that if Juventus were able to hold onto the winning score longer it might have forced Inter to make more mistakes in wanting to score, but Inter quickly equalized and looked more active in wanting to win. A draw was a more acceptable result for Inter than for Juventus, as they were able to maintain their advantage in the away match.
It was not a luck that Inter Milan could equalize the score quickly, they did good efforts. They even played better in the match, they dominated the ball possessions and they made more shots attempts. I think we can say that Juventus was lucky because Inter didn't score more goals, Inter missed some shot attempts. If Inter players have a better accuracy in shooting, Inter probably wins the match. However, everyone agrees that a draw was a fair result for the match, each team gets 1 point in the match.
Exactly, Inter completely dominated that match and they continued to try to do so even though in the end the draw remained unchanged. Juventus played well in defense and they struggled to build attacks and get more chances, but that is fair for both teams and will then benefit Milan and Napoli who are below them.
Currently Milan is only 4 points away from Juventus and 6 points away from Inter. Milan, who previously beat Fiorentina, managed to narrow the points gap with Juventus and Inter following a draw in that match, but Milan has not been convincing even though they managed to improve their form in the last match. I am somehow convinced that Milan will fail to fight for the title because their performance is not improving, they are dropping too many points even in games they should be able to win.