No, that's safe advice but not necessarily solid. Before the mid 90's there was no pre-punched anything. Can a first time builder successfully build a non-prepunched kit, or heaven forbid, a plans built plane-- Absolutely. Just understand that the non-prepunched road is/can be more difficult and time consuming, especially for a first timer, but should not be considered a show stopper IMO. Bottom line is, what are you capable of doing and what's your level of commitment to learning new skills?
So, here's what you do. Buy the RV training project for $35 from Van's. Buy (or borrow) the Jeppesen Sheet Metal Handbook for $16:
http://www.amazon.com/Aircraft-Sheet.../dp/0891002960
Buy a small sheet of .025 or .032 2024 from Aircraft Spruce or any aluminum supplier (a 2'x2' sheet of .032 is $12 from Spruce) and perhaps a length of 3/4"X3/4" alum angle.
Then borrow some tools from, or visit a local builder (lots of builders are loathe to loan tools out but are more than willing to share in their shop), or your local EAA Chapter (many have tool cribs that loan out tools) and complete the Van's kit which will give you a taste of pre-punched construction. Then build one of parts that are an example out of the Jeppensen book. This will give you a taste for scratch built construction.
Then go with the project that uses the type of construction that you get the most enjoyment from.
As Stein would say, my $.02