Because of the greater investor/regulator financial and legal scrutiny, better access to cheap capital, and tighter regulation over who can/cannot be a director

Because of the greater investor/regulator financial and legal scrutiny, better access to cheap capital, and tighter regulation over who can/cannot be a director * , your company has a greater probability of long term survival. This makes it more likely that people will value your company at a greater multiple of annual earnings. *At least in the UK.