Qualification updates are an essential part of improving the skills required in industry. So it sucks when someone tells you to do a newer version of the same skills.
This is why Vast Fitness set up a Bridging Course to continue your career progression from the superseded Certificate III to the current SIS40215 Certificate IV in Fitness. Sure there are a few extra assessments to secure the new skills. But that’s way better than doing the Certificate III in Fitness all over again.