That is interesting then. Not sure if they ever publicly explained the reason they scrapped the full jetty swim? From a safety perspective I would think they could keep a better eye on everyone from the elevated position.
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JAWS…
Fin-ished: Ironman WA organisers call time on iconic jetty swim due to shark concerns (watoday.com.au)
Apparently, sharks are less of a concern when everyone isn’t dressed to look like a seal, as the 3.6km Busselton Jetty Swim is still going strong and will be celebrating its 29th consecutive year next February.
Yes, in 2021 while the rest of the world struggled with covid, there were 3000 swimmers at Busso enjoying WA’s pestilence-free lifestyle.
The Busso Marathon and Half are also staged on the prior to the swim. Both swim and run events sell out months ahead.
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We all know that triathletes these days are soft. 
The day after IM Busso last year a shark paid a visit to the beach in between the jetty and the swim enclosure and some people were all freaked out about it.