Agreed, but you are a 10 handicap not a high handicap.
Even though you have more distance in CO off line still puts you off line, and unless your courses are 10% wider at all points it will still land you in the rough or trouble. Higher handicaps should still play the more forward tees no matter how far they hit it. Unless one hits it straighter, there is no reason to be on the longer tees.
How about because they enjoy it more? Isnt golf supposed to be a fun activity that you do in your free time and spend your hard earned money on? I totally agree that if you are holding people up because it takes you 3 or 4 strokes to get anywhere near the green on an average length par 4 than you need to move up or let people play through but to say that there is no reason for a high capper to play a longer/tougher course kinda misses the whole point of the game (just IMO--nothing against you personally). Playing a shorter course where you only need the driver or 3W once or twice can be fun and challenging in its own way but i still enjoy the challenge of a course that makes me hit every club in my bag to score well.
This is only a legitimate concern if their fun doesn't impinge on anyone else's fun. Meaning that my group isn't waiting on Joe Hacker in front of me as he constantly searches the weeds and woods all day long for his ball because he has no control from the back tees with his driver.
There is more to consider than just your fun. I have no idea why anyone would call that fun in the first place.