Bringing in record profits, sure.
However loss of market share typically also means loss of revenue, record profits are as high as they could be, even higher record profits......
If Disney is measuring their success solely on record profits, then they are looking at things in a short term world.
The point is, nothing they are doing is affecting Disney. The entire base might be expanding, but they aren't cutting into Disney's attendance at all, it is still growing at the rates they have always been, and revenue/profits are up huge every quarter.
Universal will likely experience a jump this summer, then normalize back to their normal growth, just like IOA did. Do you think Universal's growth will mean Disney is going to experience losses in attendance? It's not going to happen.