It's fear of malware.
It's fear of data being locked up in the format used by an employee's personal tool.
Above all, it's fear of being held responsible for any of the above.
It's also a fear of being not needed.
Having the resources to install a CRM for someone this year is a fundamental part of any properly equipped IT department.
Can you call your IT security strong if you are dangling irresistible incentives to break the security?