Not many other places to hook a line to to tow it out of the water. If I was that tow truck driver I wouldn't wast much time laying in that water feeling for a better place to hook to. Especially as it is would probably be well under the car. Water, mud, wet grass, not exactly high coefficient of friction surfaces either. The wheel is probably just fine, it can support 1000hp and the stress of a 4,000lb car at 254 mph. having to possibly buy a new wheel is also pretty far down on the list of worries for that car. aside from the interior damage, I also heard that when the owner/driver got out of the car he left the engine running and admitted that it ran for about 15 minutes before "it shut off all by itself". If he hydrolocked that 8.0 litre, quad turbocharged W16, that will be one very hefty repair bill.
Those cars are also all wheel drive. The front wheel was rolling as they were pulling so it was not in gear.