As confirmed in January, the 23-year-old will officially become a Bayern player on 1 July, following five years in the royal blue of Schalke.
Watch: Goretzka taking his talents to Bayern
"I came to the conclusion that now is the right time to make the step," Goretzka told Funke-Mediengruppe. "I had the feeling that I needed to go out of my comfort zone in order to improve. I thought long and hard about it, and I was prepared for the fallout. It was the be-all and end-all for some; while others understood. I certainly didn't want to offend any of the Schalke fans."
Goretzka is the second high-profile name to leave Schalke for Bayern in recent years, after goalkeeper Manuel Neuer. To this day, both transfers are anathema to some royal-blue die hards, but Goretzka's commitment to his current employers remains firmly in place.
"For me, it's incredibly important to leave Schalke on a high," the Germany international explained. "When I joined Schalke, they were in the Champions League. It'd be tough to take if I left with them in the Europa League.
"In general, I hope the fans don't just remember the last six months, but rather the goals I scored and effort we all put in."
With Schalke second only to soon-to-be-recrowned-champions Bayern after 27 matches, Goretzka may well get his wish. The prospect of returning to the Champions League wasn't enough to sway him to stay with Die Knappen, but playing regularly in Europe's premier club competition did influence his decision to move to the Allianz Arena.
The race for those European spots is getting mighty interesting with seven games left to play... 👀 pic.twitter.com/xGYlQc1nEo— Bundesliga English (@Bundesliga_EN) March 18, 2018
"Bayern approach the Champions League with completely different expectations," Goretzka said. "At Schalke, the focus is purely on getting out of the group. I want to be part of that at Bayern, and I think it's the right step for me.
"Until then, I want to help Schalke realise their objective and, then, hopefully, I'll be going to the World Cup with Germany. I have a good chance, as long as I continue to play well."