Literally, Liverpool isn't as strong as in those season's when team like Manchester city were in top lead for the EPL title, like win matches with opponents completely hands down. What am I trying to say? Arsenal gave Manchester city the biggest pressures in all the seasons that City won the EPL trophy. Unlike what they are doing this season with Liverpool, the competition is not heated as Arsenal have been so inconsistent with their performance dropping points even in games they should win and take all points therefore leave Liverpool with little or no pressure in the race this season.
Arsenal are once again not strong enough to chase the leader, and Liverpool are just lucky that City are at a turning point this season when they need to update their squad, when there is the loss of such an important player as Rodri and frequent injuries to other players, especially at the beginning of the season, all this played into the hands of Liverpool, and they are moving towards the title without feeling any competition from their rivals, and Arsenal will again be second.