I think that there is hardly anyone doubting that Napoli is going to win the league title.
Napoli, in contrast to last year, has proven that they can keep winning their games, even the close games, for weeks and even months now.
If seen from the current position with the number of points, no doubt that Napoli's position will be indeed difficult to take over. It has been 23 matches from 38 entirely. The difference points between Napoli and the runner-up is more than 15. This is a far difference. It seems to be very hard and impossible to reach and take over. Moreoever, Napoli's performance is always great in every match, very consistent than others. It is very different from what happened to other clubs in Serie which are not consistent in being good in every match.
Meanwhile, Inter, in second place, were unable to play well and optimally so they could only get draws, not wins. Even though it was only against a small club that was in the relegation zone. There must be something wrong with the result, because if you look at it in any way, Inter has an advantage over Sampdoria.
Yes even if Inter Milan wins the games over and over again, it would still need Napoli to lose again and again and that is just not realistic at this point. It's also not very likely that the teams behind Napoli will win 10 games in a row and that is what is required to overtake them for sure.
Napoli's next two games are also relatively easy and by then we have only 14 games left. If they didn't fail in the Coppa Italia, they would have had the chance for a perfect season. I think they will make it against Frankfurt in the champions league.