What are the disadvantages of indemnity insurance?

What are disadvantages of indemnity insurance in Australia include cost $500 to $20,000 per year, exclusions, high excess $1,000 to $5,000, claims may increase premium 20% to 50%, and it does not cover all risks like intentional wrongdoing and pre-existing claims. Disadvantages include cost $500 to $1,000 per year for consultant $1M cover, $1,000 to $2,000 for real estate $2M, $2,000 to $5,000 for architect $2M to $5M and $10,000 to $20,000 for doctor $20M, which is expense for small business revenue $100K to $200K, though tax deductible saving 30% tax $150 to $6,000. Exclusions include intentional wrongdoing, fraud, dishonesty, pre-existing claims known before policy, and bodily injury and property damage covered by public liability not PI, so if you intentionally give wrong advice, PI does not cover $100K claim. High excess $1,000 to $5,000 payable by you on each claim $100K, so you pay $2,000 excess plus premium. Claims may increase premium 20% to 50% next year, from $1,000 to $1,500, and may cause refusal for high risk. It does not cover general business risks like cyber, public liability and loss of income, requiring separate policies $300 to $800 each. So disadvantages of indemnity insurance are cost $500 to $20,000 per year, exclusions for intentional and pre-existing, high excess $1,000 to $5,000, premium increase 20% to 50% after claim, and not covering all risks, but still essential to avoid $100K to $500K claims for professionals.