I am really surprised at the lack of positive comments towards Sergio on this matter. Professional golfers are often (properly) criticized for their ignorance per some parts of the rules of golf. However, in this case, Sergio was clearly very aware of the rule per "abnormal ground conditions" and "burrowing animals".
This can be a subjective interpretation, so he properly called in the rules official and made his case. The whole exchange appeared on TV, and both parties appeared to quickly be in agreement. I know nothing about the employees of the PGA Tour, but I have heard the name Slugger White for many years and seen him on TV before making rules calls. I doubt a person of his experience was intimidated by a request for a rule decision from Sergio Garcia.
The rules can be a penalty, but the rules can also be of assistance. If Sergio can be a victim to the rules he can also be a beneficiary. There are circumstances where players have :pushed the envelope too far" in requesting relief under the rules, but this case seemed reasonable when watching on TV.
Finally the drop he obtained while helpful, still left a challenging shot and the result indicates that the relief did not remove all of the difficulty he was in before the relief was granted.
Of course I was not there, and it is possible that 8 out 10 (or only 2 out of 10) rules officials would have made a different call. Of course these could extend from no relief to choosing a different point of nearest relief. But, Sergio knew the rule, used it to his advantage fairly, properly allowed the rules official to make the final call, and Sergio appeared on TV to be very civil and reasonable with Slugger White during the entire encounter.
So what this the problem with this?