It's a very valid question, instead of saying it "elitist" look at the underlying question here.
If you cant hold 2min pace in a pool it means that your technique is pretty/very poor. It also suggests that you have spent little time in the water. For most people a few months of some effort in the pool (most people on ST seem to swim about 6-8k's a week...which is enough for the MOPer) will result in some significant improvements in the water. These improvements translate into a more efficient stroke (hence not being as tired in the swim) and more comfort in the water.
The people who pull out of swims (exlcuding those who are hit/injured) are the ones who are uncomfortable in the water, they are tired as their technique is inefficient, a wetsuit can mask that to an extent (allows you to float with minimal effort). Unlike in running and cycling one can't simply stop, get ones breath back and then resume. Being in the water is a constant.
Its is NOT being elitist to question how prepared people are for a swim. I'm not saying people who can't hold say a sub 1:30 pace for 3.8ks are: lazy, not worthy of doing an IM etc etc. One can swim any pace and be comfortable, however the harsh reality is that for the vast majority of people who can't hold 2mins or less for 100yards, they are quite likely to find the swim very uncomfortable.
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