Hi Mike,
Security groups are optional. If a company chooses not to use security groups, then all users have to read the date values from somewhere, which is actually the Maintenance / Define Quote Entry Template rather than the company profile. Perhaps the company profile was set up in a time before Quotes supported entry templates - who knows...
When a security group is created, it reads values from the 'main' entry template to populate the security group template. It is your choice to leave the same settings or change them - it's usually better to give more flexibility than less. It's a good question whether sites choose to modify them for different security groups - I don't know if this feature is utilized. It's likely easier for the programmer to have the entire entry template on the security group, rather than read some info from there, other info from this place, and other info from the profile, etc.
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Regards,
Softrak Tech Support