Okay. When i first installed stone work surfaces back in the 1980s that would have been standard practice. Templating was done by fitters with hardboard and a jigsaw and you needed gaps all round for tolerance anyway. The joins often cracked because of normal movement of anything and everything, imo especially because a standard euro carcase was never strong or rigid enough for the weight.
When I last installed stone worksurfaces about 15 years ago if you had any sense you had the granite prepared by a yard with massive cnc machinery. They would make a digital template with a pointer arm attached to a laptop on a tripod and you could assemble some joins so closely that a mere smear of silicone was enough to squeeze out and seal the joint.
When you left the site the join was seen as feint line only. The carcases were still crap though, and everything still moved when the heating came on.
TW