I guess it depends if the installer is trained how to put an RJ45 on correctly.
If they are, and if they are using the correct ends for the cable and a good crimper, there should be no problem.
I've just seen so many incorrectly installed RJ45s (plugs designed for stranded cable used on solid cable being the most common issue)...unless I know for a fact that the person is trained to install them and is using correct materials...I'd rather a jack be installed. It is MUCH easier to install a jack correctly. There's no issue with getting the wrong kind of jack for the cable, they are all designed for solid cable.