In links golf, we find it part of the charm if you have to play backwards, or play into a flatter part of the bunker. How is that different from having to do the same because of the irregularities of un-raked bunkers?
Irregular bunkers also lead to more course strategy. If your bunker game is gash, you should already be trying like hell to avoid them. Less consistent maintenance would make more players do the same, which is the purpose of the bunker in the first place.
Those with bad bunker games might not even suffer. Poor bunker players may do better when they have a bad lie and are just focused on getting the ball out, as opposed to trying to hit some shot of pure professional-level beauty.
Finally, maybe the harshening of bunkers would eventually lead to the return of the bogey score — the score a very good golfer should make on a hole — and bring par back to its original role of representing the 'perfect' score.