Is it worth protecting a no-claims bonus?

Is it worth protecting no-claims bonus in Australia and UK, yes it is worth it if you have high no-claims bonus 50% to 60% discount saving $400 to $900 per year on comprehensive $800 to $1,500 per year, with protected no-claims add-on costing $50 to $100 per year extra, allowing 1 to 2 at-fault claims in 3 years without losing discount, paying for itself if you have one accident $5K claim in 2 to 5 years. Protected no-claims bonus, also called protected NCD, costs $50 to $100 per year extra on comprehensive $800 to $1,500, protecting discount 20% to 60% saving $160 to $900 per year. For example, comprehensive $1,000 per year, 5 years no claims 50% discount = $500 premium saving $500 per year, protected add-on $70 extra, total $570, if you have 1 at-fault accident $5K claim without protection, discount drops from 50% to 30% next year, premium increases from $500 to $700, losing $200 saving plus 2 years to rebuild bonus losing $400 total $600 loss over 2 years, with protection you keep 50% discount $500 premium, saving $200 per year $400 over 2 years, paying $70 per year $140 total for 2 years, net saving $260. If you have low no-claims 20% to 30% discount $160 to $240 saving, protection $50 to $100 may not be worth it as loss small $100 to $150 if claim. So worth protecting no-claims bonus if you have high bonus 50% to 60% discount $400 to $900 saving, costing $50 to $100 per year extra, paying for itself with one accident in 2 to 5 years saving $200 to $400 per year premium increase, but not worth it if low bonus 20% to 30% $160 to $240 saving and you are low risk driver with no claims 10 years.