Because that quote is true.. (By the way it's not I know you're too dumb to understand sarcasm..) The music will sound like **** on your iPod if it sounds like **** on your computer and anything else.
Most computers, if not all of them 2010 or newe, have at least 32gb of space free after your OS.. 1,000 HQ MP3s will be 7gb, and 100 HQ FLACs will be the same or so.
Quality > Space when it comes to music. Buy an external HDD if you need the space, not cut music quality.