Drilling bolts
I’m on the other side of this one. I have the bolt drill jig, and I’m glad I do. I use it every once in a while. My current RV-14A build is my second aircraft build, plus a set of floats. With maintenance and upkeep, you will need a bolt from time to time, sometimes a drilled bolt. It’s a useful tool that I use occasionally and when I do it saves me time and shipping costs that would have been needed otherwise. The biggest thing is that it lets you keep moving on your project without waiting on an order. Just remember to put a drop of corrosion protection in the hole, as it disturbs the cad plating. I use this jig with a drill press and have not had problems with broken bits.
It is true that your kit has all the AN bolts spec’d in the plans. But not all the bolts you will ever need. Best practice is not to reuse bolts after they have been torqued. So disassembly of a structure (once completed) will prompt a new hardware need.... and you will end up needing your own stock at some point.
Just my 2 cents