Lazio doesn't necessarily need to beat all the top contenders of the Seria A title to win the league. If they can consistently beat smaller teams and get more points from these games. Even if they lose or get a draw playing these big teams, they can still win the League.
Lazio is not doing badly, they have twenty-five points similar to Inter Milan, Atalanta, and Fiorentina. A win can take them to the top of the league depending on the results of other top clubs.
Yes point is what matters and not wining all those considered to have the high performance of the league because if is only about winning them it could happen and still Lazio will not win the league because of insufficient points, so you are right Lazio should not even think about those that stand as a threat to them but instead they should get enough point from other clubs, actually I don't see any impossibility on the Lazio team especially this time they are close Atalanta and inter Milan, what is important for them now is to disregard any big team on the top of the table because they could get discouraged