The main way in which a wetsuit increases safety is through buoyancy.
It’s a bit weird I have to state the obvious to a proper triathlete.
We all know that a wetsuit offers buoyancy, which can be an assistance to a weaker swimmer. Therefore the use was condemned in the swimming world, although in recent years FINA finally introduced the wetsuit rule to minimise the chance of hypothermia happening in races.
However, I don’t see how increasing buoyancy offers safety. I can only see that the extra warmth offers safety by avoiding hypothermia.
(a) too many entrants haven’t done enough swim training, and defo not OW training, even for an iron distance race (never mind a short event with lots of newbies).
(b) lots on the start line are shitting themselves (partly due to (a))
(c) it’s a mass start, 1200+ people. The mass start is something that makes the race special still. But it does mean people can get swum over, accidentally hit and kicked, etc. Having a floating unconscious person is a lot better than a submerged unconscious person. For EVERYONE concerned.
This should be done by proper screening of participants.
I moved from Hong Kong where no triathlons / aquathons are held in the wetsuit legal season. However, there is a triathlon (one of the higher level races there) is held in a higher-risk location (deep water start in an open sea which is usually choppy due to it being unsheltered). Entrants are required to do a swim test a few weeks beforehand, at the same time as another aquathon race held in a sheltered beach, if they don’t have previous race results and don’t do that aquathon.
How many participants does the race you mention typically have? London is one of the biggest triathlons in the world with 10k+ entrants. Having them all complete a swim test in advance would be logistically impossible.
There are triathlon rules I think are stupid - a DSQ for crossing the finish line with an unzipped trisuit for example. However ultimately these events are run by private companies and they can decide on whatever rules they want. If they mandate that everyone has to compete wearing a giant panda suit then either you suck it up and get yourself a giant panda suit or you just find a different race to enter.
It’s the only race in London itself though.
BTW, how come these triathlons are run by private companies? Aren’t all sport competitions run by clubs governed by the relevant federation?