Continuing professional development is up to a business and/or individual. Accredited courses cost a lot of money and cover a very specific set of criteria to meet a national standard.
After you qualify, things change, people experience events and people share that on the job.
Your workplace may run a training session for you. While it isn’t accredited, it gives you an update, context from your employer and an ability to learn a different approach.
Accredited courses give you the foundation and a qualification. You then must maintain this and upskill, learn different perspectives and add to your toolbox.
Registered courses via RTOs are education and foundational. Bespoke and custom courses drill down to real experience and shared knowledge and provide you something to show potential employers (or current ones for promotion) your worth, skills and ability to learn.
For someone with a higher education, the value of a custom course may be something different. For example, applying it to an organisation that doesn’t operate at that higher level (such as civilian, non-enforcement/security), or, to appreciate your understanding against others and confirm or modify your knowledge and expectations based on different perspectives.