>>281446506 (OP)
You'll have less experiences because of the time investment required to not only learn conversational Japanese but also learn the idioms and slang not to mention the cultural and historical context that's often subtextual. Yes, that stuff is necessary when it comes to improving your experience. Otherwise, you might as well learn French and read French scans. Add up all the time it will take to not just learn the language but also the history, culture, and pop culture, to where you're having dreams in Japanese and can write creatively in Japanese, and ask yourself what else you could be doing with that time. Your time here is limited, moreso when factoring in working.