Regardless of account type, there are many things that could require you to need those Bitlocker keys to get your data. Don't just associate them with an account, have Windows save the keys to a text file, and save that text file somewhere external, on a NAS or Dropbox or email itnto yourself or whatever, and print out 2 or 3 hard copies and keep them close by. I'm 1000x more worried about losing my data to a Windows crash/error than to theft or any other external actor.