Sane, 22, enjoyed an incredible season with the Citizens, scoring 10 goals and registering 15 assists as they romped to the Premier League title in record-breaking fashion.
His exploits under manager Pep Guardiola saw him earn the PFA Young Player of the Year and a nomination for the PFA Player of the Year - but he was surprisingly cut by Low for the final 23-man selection.
However, Hummels stands by the unpopular decision and shed further insight on the challenges of the new generation of German football starlets.
"Leroy Sane has not the same standing as Thomas Muller or Mesut Ozil," Hummels told reporters, as quoted by Sport Bild. "Sometimes it takes time to have the same standing in the national team as in your club.
"It is noticeable that the guys coming up from youth ranks - at Bayern too - are different guys to 10, 12 years ago. That is the new generation. They are characterised by a different behaviour, like on social media.
"I was always the youngest one in my team and I had to carry the goals. That is simply normal. Nowadays you notice some 18-year-olds don't understand why they have to do this.
"I didn't talk a single word in the Bayern locker room during the first weeks. I only talked to Stephan Furstner and Michael Rensing because I knew them from the second team," Hummels added.
"To everyone else I maybe said 'hello', but today everything is faster and after one week players behave like they've already played three years for the team."